./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:14:31,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:14:31,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:14:31,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:14:31,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:14:31,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:14:31,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:14:31,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:14:31,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:14:31,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:14:31,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:14:31,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:14:31,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:14:31,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:14:31,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:14:31,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:14:31,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:14:31,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:14:31,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:14:31,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:14:31,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:14:31,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:14:31,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:14:31,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:14:31,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:14:31,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:14:31,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:14:31,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:14:31,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:14:31,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:14:31,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:14:31,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:14:31,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:14:31,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:14:31,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:14:31,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:14:31,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:14:31,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:14:31,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:14:31,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:14:31,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:14:31,286 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:14:31,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:14:31,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:14:31,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:14:31,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:14:31,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:14:31,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:14:31,333 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:14:31,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:14:31,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:14:31,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:14:31,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:14:31,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:14:31,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:14:31,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:14:31,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:14:31,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:14:31,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:14:31,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:14:31,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:14:31,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:14:31,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:14:31,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:14:31,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:31,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:14:31,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:14:31,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:14:31,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:14:31,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:14:31,338 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:14:31,338 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:14:31,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:14:31,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:14:31,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-11-07 08:14:31,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:14:31,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:14:31,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:14:31,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:14:31,624 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:14:31,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 08:14:31,689 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/456839ebf/a27f108cea0e437ba6c03188a8918984/FLAGac474398a [2021-11-07 08:14:32,282 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:14:32,282 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 08:14:32,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/456839ebf/a27f108cea0e437ba6c03188a8918984/FLAGac474398a [2021-11-07 08:14:32,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/456839ebf/a27f108cea0e437ba6c03188a8918984 [2021-11-07 08:14:32,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:14:32,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:14:32,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:32,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:14:32,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:14:32,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:32" (1/1) ... [2021-11-07 08:14:32,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d8ce39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:32, skipping insertion in model container [2021-11-07 08:14:32,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:32" (1/1) ... [2021-11-07 08:14:32,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:14:32,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:14:33,161 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_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 08:14:33,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:33,202 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:14:33,310 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_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 08:14:33,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:33,329 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:14:33,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33 WrapperNode [2021-11-07 08:14:33,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:33,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:33,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:14:33,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:14:33,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:33,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:14:33,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:14:33,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:14:33,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:14:33,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:14:33,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:14:33,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:14:33,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:33,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:14:33,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:14:33,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:14:33,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:14:33,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:14:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:14:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:14:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:14:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:14:33,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:14:33,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:14:33,967 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 08:14:36,648 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 08:14:36,648 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 08:14:36,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:14:36,657 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 08:14:36,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:36 BoogieIcfgContainer [2021-11-07 08:14:36,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:14:36,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:14:36,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:14:36,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:14:36,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:14:32" (1/3) ... [2021-11-07 08:14:36,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ed7a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:36, skipping insertion in model container [2021-11-07 08:14:36,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33" (2/3) ... [2021-11-07 08:14:36,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ed7a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:36, skipping insertion in model container [2021-11-07 08:14:36,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:36" (3/3) ... [2021-11-07 08:14:36,669 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2021-11-07 08:14:36,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:14:36,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:14:36,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:14:36,745 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=PETRI_NET, 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 [2021-11-07 08:14:36,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:14:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:14:36,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:36,775 INFO L513 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] [2021-11-07 08:14:36,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash 918516044, now seen corresponding path program 1 times [2021-11-07 08:14:36,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:36,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336441639] [2021-11-07 08:14:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:36,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:37,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:37,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336441639] [2021-11-07 08:14:37,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336441639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:37,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:37,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:37,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698836208] [2021-11-07 08:14:37,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:37,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:37,227 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:38,463 INFO L93 Difference]: Finished difference Result 335 states and 570 transitions. [2021-11-07 08:14:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-07 08:14:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:38,478 INFO L225 Difference]: With dead ends: 335 [2021-11-07 08:14:38,478 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 08:14:38,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 08:14:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2021-11-07 08:14:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5723684210526316) internal successors, (239), 152 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 239 transitions. [2021-11-07 08:14:38,571 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 239 transitions. Word has length 44 [2021-11-07 08:14:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:38,572 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 239 transitions. [2021-11-07 08:14:38,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 239 transitions. [2021-11-07 08:14:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:14:38,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:38,586 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:38,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:14:38,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2003514045, now seen corresponding path program 1 times [2021-11-07 08:14:38,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:38,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751003299] [2021-11-07 08:14:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:38,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:38,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:38,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751003299] [2021-11-07 08:14:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751003299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:38,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:38,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:38,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822388703] [2021-11-07 08:14:38,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:38,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:38,853 INFO L87 Difference]: Start difference. First operand 153 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:40,216 INFO L93 Difference]: Finished difference Result 302 states and 466 transitions. [2021-11-07 08:14:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-07 08:14:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:40,219 INFO L225 Difference]: With dead ends: 302 [2021-11-07 08:14:40,220 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 08:14:40,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 08:14:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2021-11-07 08:14:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 152 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 238 transitions. [2021-11-07 08:14:40,232 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 238 transitions. Word has length 57 [2021-11-07 08:14:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:40,232 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 238 transitions. [2021-11-07 08:14:40,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 238 transitions. [2021-11-07 08:14:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:14:40,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:40,235 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:40,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:14:40,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2065525010, now seen corresponding path program 1 times [2021-11-07 08:14:40,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:40,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280848753] [2021-11-07 08:14:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:40,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:40,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:40,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280848753] [2021-11-07 08:14:40,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280848753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:40,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:40,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:40,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783764206] [2021-11-07 08:14:40,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:40,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:40,399 INFO L87 Difference]: Start difference. First operand 153 states and 238 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:42,854 INFO L93 Difference]: Finished difference Result 301 states and 464 transitions. [2021-11-07 08:14:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 08:14:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:42,857 INFO L225 Difference]: With dead ends: 301 [2021-11-07 08:14:42,857 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 08:14:42,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 08:14:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 153. [2021-11-07 08:14:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5592105263157894) internal successors, (237), 152 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 237 transitions. [2021-11-07 08:14:42,869 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 237 transitions. Word has length 58 [2021-11-07 08:14:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:42,870 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 237 transitions. [2021-11-07 08:14:42,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 237 transitions. [2021-11-07 08:14:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:14:42,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:42,872 INFO L513 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] [2021-11-07 08:14:42,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:14:42,877 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1018014206, now seen corresponding path program 1 times [2021-11-07 08:14:42,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:42,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389226558] [2021-11-07 08:14:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:42,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:42,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:42,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389226558] [2021-11-07 08:14:42,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389226558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:42,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:42,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:42,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265776762] [2021-11-07 08:14:42,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:42,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:42,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:42,984 INFO L87 Difference]: Start difference. First operand 153 states and 237 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:44,529 INFO L93 Difference]: Finished difference Result 301 states and 463 transitions. [2021-11-07 08:14:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 08:14:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:44,532 INFO L225 Difference]: With dead ends: 301 [2021-11-07 08:14:44,532 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 08:14:44,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 08:14:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 153. [2021-11-07 08:14:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5526315789473684) internal successors, (236), 152 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 236 transitions. [2021-11-07 08:14:44,544 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 236 transitions. Word has length 58 [2021-11-07 08:14:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:44,545 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 236 transitions. [2021-11-07 08:14:44,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 236 transitions. [2021-11-07 08:14:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:14:44,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:44,547 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:44,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:14:44,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:44,548 INFO L85 PathProgramCache]: Analyzing trace with hash -117852089, now seen corresponding path program 1 times [2021-11-07 08:14:44,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:44,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466819322] [2021-11-07 08:14:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:44,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:44,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:44,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466819322] [2021-11-07 08:14:44,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466819322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:44,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:44,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:44,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546847652] [2021-11-07 08:14:44,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:44,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:44,654 INFO L87 Difference]: Start difference. First operand 153 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:47,039 INFO L93 Difference]: Finished difference Result 300 states and 461 transitions. [2021-11-07 08:14:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 08:14:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:47,042 INFO L225 Difference]: With dead ends: 300 [2021-11-07 08:14:47,042 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 08:14:47,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 08:14:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2021-11-07 08:14:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5460526315789473) internal successors, (235), 152 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 235 transitions. [2021-11-07 08:14:47,052 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 235 transitions. Word has length 58 [2021-11-07 08:14:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:47,052 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 235 transitions. [2021-11-07 08:14:47,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 235 transitions. [2021-11-07 08:14:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:14:47,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:47,055 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:47,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:14:47,055 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:47,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1203001223, now seen corresponding path program 1 times [2021-11-07 08:14:47,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:47,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26491509] [2021-11-07 08:14:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:47,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:47,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:47,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26491509] [2021-11-07 08:14:47,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26491509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:47,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:47,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:47,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017069854] [2021-11-07 08:14:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:47,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:47,151 INFO L87 Difference]: Start difference. First operand 153 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:49,439 INFO L93 Difference]: Finished difference Result 298 states and 458 transitions. [2021-11-07 08:14:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 08:14:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:49,441 INFO L225 Difference]: With dead ends: 298 [2021-11-07 08:14:49,441 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 08:14:49,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 08:14:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2021-11-07 08:14:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5394736842105263) internal successors, (234), 152 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 234 transitions. [2021-11-07 08:14:49,448 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 234 transitions. Word has length 58 [2021-11-07 08:14:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:49,449 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 234 transitions. [2021-11-07 08:14:49,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 234 transitions. [2021-11-07 08:14:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:14:49,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:49,450 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:49,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:14:49,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:49,451 INFO L85 PathProgramCache]: Analyzing trace with hash -293840518, now seen corresponding path program 1 times [2021-11-07 08:14:49,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:49,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235268510] [2021-11-07 08:14:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:49,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:49,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:49,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235268510] [2021-11-07 08:14:49,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235268510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:49,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:49,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:49,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209537345] [2021-11-07 08:14:49,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:49,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:49,535 INFO L87 Difference]: Start difference. First operand 153 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:51,877 INFO L93 Difference]: Finished difference Result 298 states and 457 transitions. [2021-11-07 08:14:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-07 08:14:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:51,879 INFO L225 Difference]: With dead ends: 298 [2021-11-07 08:14:51,879 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 08:14:51,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 08:14:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2021-11-07 08:14:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5328947368421053) internal successors, (233), 152 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 233 transitions. [2021-11-07 08:14:51,887 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 233 transitions. Word has length 59 [2021-11-07 08:14:51,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:51,887 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 233 transitions. [2021-11-07 08:14:51,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 233 transitions. [2021-11-07 08:14:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:14:51,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:51,894 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:14:51,895 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash 366566809, now seen corresponding path program 1 times [2021-11-07 08:14:51,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:51,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074935116] [2021-11-07 08:14:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:51,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:52,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:52,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074935116] [2021-11-07 08:14:52,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074935116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:52,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:52,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:52,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443865175] [2021-11-07 08:14:52,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:52,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:52,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:52,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:52,049 INFO L87 Difference]: Start difference. First operand 153 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:54,375 INFO L93 Difference]: Finished difference Result 298 states and 456 transitions. [2021-11-07 08:14:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:54,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 08:14:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:54,377 INFO L225 Difference]: With dead ends: 298 [2021-11-07 08:14:54,377 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 08:14:54,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 08:14:54,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2021-11-07 08:14:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5263157894736843) internal successors, (232), 152 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-11-07 08:14:54,383 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 60 [2021-11-07 08:14:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:54,384 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-11-07 08:14:54,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-11-07 08:14:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:14:54,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:54,385 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:54,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:14:54,385 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2037555573, now seen corresponding path program 1 times [2021-11-07 08:14:54,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:54,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369762547] [2021-11-07 08:14:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:54,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:54,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:54,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369762547] [2021-11-07 08:14:54,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369762547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:54,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:54,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:54,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466154542] [2021-11-07 08:14:54,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:54,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:54,470 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:56,736 INFO L93 Difference]: Finished difference Result 288 states and 442 transitions. [2021-11-07 08:14:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-07 08:14:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:56,741 INFO L225 Difference]: With dead ends: 288 [2021-11-07 08:14:56,741 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 08:14:56,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 08:14:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-11-07 08:14:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.519736842105263) internal successors, (231), 152 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 231 transitions. [2021-11-07 08:14:56,748 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 231 transitions. Word has length 61 [2021-11-07 08:14:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:56,748 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 231 transitions. [2021-11-07 08:14:56,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 231 transitions. [2021-11-07 08:14:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:14:56,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:56,750 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:56,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:14:56,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1584412915, now seen corresponding path program 1 times [2021-11-07 08:14:56,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:56,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879224520] [2021-11-07 08:14:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:56,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:56,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:56,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879224520] [2021-11-07 08:14:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879224520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:56,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:56,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:56,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68434030] [2021-11-07 08:14:56,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:56,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:56,847 INFO L87 Difference]: Start difference. First operand 153 states and 231 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:57,475 INFO L93 Difference]: Finished difference Result 328 states and 503 transitions. [2021-11-07 08:14:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:57,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-07 08:14:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:57,477 INFO L225 Difference]: With dead ends: 328 [2021-11-07 08:14:57,478 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 08:14:57,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:57,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 08:14:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 175. [2021-11-07 08:14:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5459770114942528) internal successors, (269), 174 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 269 transitions. [2021-11-07 08:14:57,485 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 269 transitions. Word has length 61 [2021-11-07 08:14:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:57,485 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 269 transitions. [2021-11-07 08:14:57,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 269 transitions. [2021-11-07 08:14:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:14:57,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:57,486 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:14:57,487 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 468424994, now seen corresponding path program 1 times [2021-11-07 08:14:57,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:57,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387801451] [2021-11-07 08:14:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:57,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:57,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:57,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387801451] [2021-11-07 08:14:57,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387801451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:57,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:57,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:57,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177905016] [2021-11-07 08:14:57,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:57,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:57,561 INFO L87 Difference]: Start difference. First operand 175 states and 269 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2021-11-07 08:14:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:58,220 INFO L93 Difference]: Finished difference Result 350 states and 540 transitions. [2021-11-07 08:14:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:58,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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 [2021-11-07 08:14:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:58,222 INFO L225 Difference]: With dead ends: 350 [2021-11-07 08:14:58,222 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 08:14:58,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 08:14:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 175. [2021-11-07 08:14:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5402298850574712) internal successors, (268), 174 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 268 transitions. [2021-11-07 08:14:58,229 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 268 transitions. Word has length 74 [2021-11-07 08:14:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:58,230 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 268 transitions. [2021-11-07 08:14:58,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2021-11-07 08:14:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 268 transitions. [2021-11-07 08:14:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:14:58,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:58,231 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:58,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:14:58,232 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1386223891, now seen corresponding path program 1 times [2021-11-07 08:14:58,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:58,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247023301] [2021-11-07 08:14:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:58,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:58,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:58,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247023301] [2021-11-07 08:14:58,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247023301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:58,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:58,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:58,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971313995] [2021-11-07 08:14:58,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:58,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:58,292 INFO L87 Difference]: Start difference. First operand 175 states and 268 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:14:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:59,388 INFO L93 Difference]: Finished difference Result 349 states and 537 transitions. [2021-11-07 08:14:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:59,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 [2021-11-07 08:14:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:59,390 INFO L225 Difference]: With dead ends: 349 [2021-11-07 08:14:59,391 INFO L226 Difference]: Without dead ends: 195 [2021-11-07 08:14:59,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-07 08:14:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 175. [2021-11-07 08:14:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5344827586206897) internal successors, (267), 174 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 267 transitions. [2021-11-07 08:14:59,397 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 267 transitions. Word has length 75 [2021-11-07 08:14:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:59,397 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 267 transitions. [2021-11-07 08:14:59,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:14:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 267 transitions. [2021-11-07 08:14:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:14:59,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:59,399 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:59,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:14:59,399 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash 338713087, now seen corresponding path program 1 times [2021-11-07 08:14:59,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:59,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443606421] [2021-11-07 08:14:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:59,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:59,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:59,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443606421] [2021-11-07 08:14:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443606421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:59,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625091009] [2021-11-07 08:14:59,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:59,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:59,456 INFO L87 Difference]: Start difference. First operand 175 states and 267 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:15:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:00,747 INFO L93 Difference]: Finished difference Result 349 states and 535 transitions. [2021-11-07 08:15:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 [2021-11-07 08:15:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:00,749 INFO L225 Difference]: With dead ends: 349 [2021-11-07 08:15:00,749 INFO L226 Difference]: Without dead ends: 195 [2021-11-07 08:15:00,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-07 08:15:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 175. [2021-11-07 08:15:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.528735632183908) internal successors, (266), 174 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 266 transitions. [2021-11-07 08:15:00,756 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 266 transitions. Word has length 75 [2021-11-07 08:15:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:00,756 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 266 transitions. [2021-11-07 08:15:00,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:15:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 266 transitions. [2021-11-07 08:15:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:15:00,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:00,758 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:00,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:15:00,758 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -797153208, now seen corresponding path program 1 times [2021-11-07 08:15:00,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:00,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74109431] [2021-11-07 08:15:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:00,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:00,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:00,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74109431] [2021-11-07 08:15:00,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74109431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:00,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:00,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:00,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730623882] [2021-11-07 08:15:00,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:00,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:00,827 INFO L87 Difference]: Start difference. First operand 175 states and 266 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:15:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:03,155 INFO L93 Difference]: Finished difference Result 348 states and 532 transitions. [2021-11-07 08:15:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 [2021-11-07 08:15:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:03,160 INFO L225 Difference]: With dead ends: 348 [2021-11-07 08:15:03,160 INFO L226 Difference]: Without dead ends: 194 [2021-11-07 08:15:03,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-07 08:15:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 175. [2021-11-07 08:15:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5229885057471264) internal successors, (265), 174 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 265 transitions. [2021-11-07 08:15:03,168 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 265 transitions. Word has length 75 [2021-11-07 08:15:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:03,168 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 265 transitions. [2021-11-07 08:15:03,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:15:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 265 transitions. [2021-11-07 08:15:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:15:03,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:03,170 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:03,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:15:03,170 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:03,171 INFO L85 PathProgramCache]: Analyzing trace with hash 523700104, now seen corresponding path program 1 times [2021-11-07 08:15:03,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:03,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789655981] [2021-11-07 08:15:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:03,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:03,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:03,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789655981] [2021-11-07 08:15:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789655981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:03,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:03,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:03,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973494347] [2021-11-07 08:15:03,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:03,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:03,236 INFO L87 Difference]: Start difference. First operand 175 states and 265 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:15:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:04,727 INFO L93 Difference]: Finished difference Result 346 states and 528 transitions. [2021-11-07 08:15:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 [2021-11-07 08:15:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:04,729 INFO L225 Difference]: With dead ends: 346 [2021-11-07 08:15:04,729 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 08:15:04,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 08:15:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2021-11-07 08:15:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5172413793103448) internal successors, (264), 174 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 264 transitions. [2021-11-07 08:15:04,736 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 264 transitions. Word has length 75 [2021-11-07 08:15:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:04,736 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 264 transitions. [2021-11-07 08:15:04,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2021-11-07 08:15:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 264 transitions. [2021-11-07 08:15:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:15:04,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:04,738 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:04,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:15:04,738 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:04,739 INFO L85 PathProgramCache]: Analyzing trace with hash 122661273, now seen corresponding path program 1 times [2021-11-07 08:15:04,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:04,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400851804] [2021-11-07 08:15:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:04,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:04,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:04,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400851804] [2021-11-07 08:15:04,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400851804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:04,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:04,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:04,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784820005] [2021-11-07 08:15:04,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:04,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:04,797 INFO L87 Difference]: Start difference. First operand 175 states and 264 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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) [2021-11-07 08:15:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:05,858 INFO L93 Difference]: Finished difference Result 346 states and 526 transitions. [2021-11-07 08:15:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 [2021-11-07 08:15:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:05,860 INFO L225 Difference]: With dead ends: 346 [2021-11-07 08:15:05,860 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 08:15:05,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 08:15:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2021-11-07 08:15:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5114942528735633) internal successors, (263), 174 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 263 transitions. [2021-11-07 08:15:05,867 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 263 transitions. Word has length 76 [2021-11-07 08:15:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:05,867 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 263 transitions. [2021-11-07 08:15:05,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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) [2021-11-07 08:15:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 263 transitions. [2021-11-07 08:15:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:15:05,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:05,869 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:05,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:15:05,869 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 393220442, now seen corresponding path program 1 times [2021-11-07 08:15:05,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:05,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920905840] [2021-11-07 08:15:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:05,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:05,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:05,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920905840] [2021-11-07 08:15:05,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920905840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:05,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:05,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:05,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510281424] [2021-11-07 08:15:05,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:05,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:05,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:05,927 INFO L87 Difference]: Start difference. First operand 175 states and 263 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:08,191 INFO L93 Difference]: Finished difference Result 346 states and 524 transitions. [2021-11-07 08:15:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-07 08:15:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:08,193 INFO L225 Difference]: With dead ends: 346 [2021-11-07 08:15:08,193 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 08:15:08,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 08:15:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2021-11-07 08:15:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5057471264367817) internal successors, (262), 174 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 262 transitions. [2021-11-07 08:15:08,199 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 262 transitions. Word has length 77 [2021-11-07 08:15:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:08,199 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 262 transitions. [2021-11-07 08:15:08,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 262 transitions. [2021-11-07 08:15:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:15:08,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:08,201 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:08,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:15:08,202 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1431149100, now seen corresponding path program 1 times [2021-11-07 08:15:08,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:08,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488668298] [2021-11-07 08:15:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:08,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:08,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:08,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488668298] [2021-11-07 08:15:08,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488668298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:08,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:08,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:08,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067532638] [2021-11-07 08:15:08,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:08,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:08,276 INFO L87 Difference]: Start difference. First operand 175 states and 262 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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) [2021-11-07 08:15:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:09,325 INFO L93 Difference]: Finished difference Result 336 states and 509 transitions. [2021-11-07 08:15:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 [2021-11-07 08:15:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:09,327 INFO L225 Difference]: With dead ends: 336 [2021-11-07 08:15:09,327 INFO L226 Difference]: Without dead ends: 182 [2021-11-07 08:15:09,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-07 08:15:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2021-11-07 08:15:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5) internal successors, (261), 174 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 261 transitions. [2021-11-07 08:15:09,333 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 261 transitions. Word has length 78 [2021-11-07 08:15:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:09,333 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 261 transitions. [2021-11-07 08:15:09,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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) [2021-11-07 08:15:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 261 transitions. [2021-11-07 08:15:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:15:09,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:09,335 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:09,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:15:09,335 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1867542727, now seen corresponding path program 1 times [2021-11-07 08:15:09,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:09,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686536882] [2021-11-07 08:15:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:09,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:09,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:09,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686536882] [2021-11-07 08:15:09,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686536882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:09,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:09,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:09,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568078343] [2021-11-07 08:15:09,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:09,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:09,413 INFO L87 Difference]: Start difference. First operand 175 states and 261 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-11-07 08:15:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:11,368 INFO L93 Difference]: Finished difference Result 440 states and 670 transitions. [2021-11-07 08:15:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 83 [2021-11-07 08:15:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:11,371 INFO L225 Difference]: With dead ends: 440 [2021-11-07 08:15:11,371 INFO L226 Difference]: Without dead ends: 286 [2021-11-07 08:15:11,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-07 08:15:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 216. [2021-11-07 08:15:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.558139534883721) internal successors, (335), 215 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 335 transitions. [2021-11-07 08:15:11,380 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 335 transitions. Word has length 83 [2021-11-07 08:15:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:11,381 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 335 transitions. [2021-11-07 08:15:11,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-11-07 08:15:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 335 transitions. [2021-11-07 08:15:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:15:11,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:11,383 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:11,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:15:11,383 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1055617271, now seen corresponding path program 1 times [2021-11-07 08:15:11,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:11,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662864531] [2021-11-07 08:15:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:11,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:11,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:11,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662864531] [2021-11-07 08:15:11,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662864531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:11,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:11,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:11,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323114691] [2021-11-07 08:15:11,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:11,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:11,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:11,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:11,478 INFO L87 Difference]: Start difference. First operand 216 states and 335 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-11-07 08:15:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:13,932 INFO L93 Difference]: Finished difference Result 461 states and 722 transitions. [2021-11-07 08:15:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:13,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 83 [2021-11-07 08:15:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:13,936 INFO L225 Difference]: With dead ends: 461 [2021-11-07 08:15:13,936 INFO L226 Difference]: Without dead ends: 266 [2021-11-07 08:15:13,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-07 08:15:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2021-11-07 08:15:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.5774058577405858) internal successors, (377), 239 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 377 transitions. [2021-11-07 08:15:13,946 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 377 transitions. Word has length 83 [2021-11-07 08:15:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:13,947 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 377 transitions. [2021-11-07 08:15:13,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-11-07 08:15:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 377 transitions. [2021-11-07 08:15:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:15:13,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:13,949 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:13,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:15:13,949 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:13,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1994521312, now seen corresponding path program 1 times [2021-11-07 08:15:13,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:13,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707519024] [2021-11-07 08:15:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:13,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:14,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:14,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707519024] [2021-11-07 08:15:14,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707519024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:14,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:14,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:14,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114938661] [2021-11-07 08:15:14,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:14,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:14,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:14,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:14,048 INFO L87 Difference]: Start difference. First operand 240 states and 377 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2021-11-07 08:15:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:16,426 INFO L93 Difference]: Finished difference Result 522 states and 818 transitions. [2021-11-07 08:15:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:16,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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 84 [2021-11-07 08:15:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:16,431 INFO L225 Difference]: With dead ends: 522 [2021-11-07 08:15:16,432 INFO L226 Difference]: Without dead ends: 303 [2021-11-07 08:15:16,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-07 08:15:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 241. [2021-11-07 08:15:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.575) internal successors, (378), 240 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 378 transitions. [2021-11-07 08:15:16,443 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 378 transitions. Word has length 84 [2021-11-07 08:15:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:16,444 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 378 transitions. [2021-11-07 08:15:16,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2021-11-07 08:15:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 378 transitions. [2021-11-07 08:15:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 08:15:16,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:16,446 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:16,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:15:16,447 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:16,448 INFO L85 PathProgramCache]: Analyzing trace with hash 248477814, now seen corresponding path program 1 times [2021-11-07 08:15:16,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:16,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070767056] [2021-11-07 08:15:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:16,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:16,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:16,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070767056] [2021-11-07 08:15:16,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070767056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:16,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:16,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:16,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010653052] [2021-11-07 08:15:16,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:16,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:16,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:16,538 INFO L87 Difference]: Start difference. First operand 241 states and 378 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-11-07 08:15:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:19,017 INFO L93 Difference]: Finished difference Result 523 states and 818 transitions. [2021-11-07 08:15:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 96 [2021-11-07 08:15:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:19,020 INFO L225 Difference]: With dead ends: 523 [2021-11-07 08:15:19,020 INFO L226 Difference]: Without dead ends: 303 [2021-11-07 08:15:19,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-07 08:15:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 241. [2021-11-07 08:15:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5708333333333333) internal successors, (377), 240 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 377 transitions. [2021-11-07 08:15:19,031 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 377 transitions. Word has length 96 [2021-11-07 08:15:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:19,032 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 377 transitions. [2021-11-07 08:15:19,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-11-07 08:15:19,032 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 377 transitions. [2021-11-07 08:15:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 08:15:19,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:19,034 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:19,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 08:15:19,035 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 692378488, now seen corresponding path program 1 times [2021-11-07 08:15:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:19,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523150679] [2021-11-07 08:15:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:19,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:19,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:19,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523150679] [2021-11-07 08:15:19,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523150679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:19,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:19,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:19,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779237909] [2021-11-07 08:15:19,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:19,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:19,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:19,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:19,158 INFO L87 Difference]: Start difference. First operand 241 states and 377 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-11-07 08:15:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:21,576 INFO L93 Difference]: Finished difference Result 487 states and 763 transitions. [2021-11-07 08:15:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 96 [2021-11-07 08:15:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:21,578 INFO L225 Difference]: With dead ends: 487 [2021-11-07 08:15:21,579 INFO L226 Difference]: Without dead ends: 267 [2021-11-07 08:15:21,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-07 08:15:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2021-11-07 08:15:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5666666666666667) internal successors, (376), 240 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 376 transitions. [2021-11-07 08:15:21,589 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 376 transitions. Word has length 96 [2021-11-07 08:15:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:21,590 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 376 transitions. [2021-11-07 08:15:21,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-11-07 08:15:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 376 transitions. [2021-11-07 08:15:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:15:21,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:21,593 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:21,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 08:15:21,593 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:21,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1137171393, now seen corresponding path program 1 times [2021-11-07 08:15:21,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:21,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087873633] [2021-11-07 08:15:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:21,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:21,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:21,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087873633] [2021-11-07 08:15:21,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087873633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:21,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:21,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:21,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608266444] [2021-11-07 08:15:21,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:21,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:21,679 INFO L87 Difference]: Start difference. First operand 241 states and 376 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:23,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:23,414 INFO L93 Difference]: Finished difference Result 522 states and 813 transitions. [2021-11-07 08:15:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:23,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:15:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:23,417 INFO L225 Difference]: With dead ends: 522 [2021-11-07 08:15:23,417 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 08:15:23,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 08:15:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 241. [2021-11-07 08:15:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5625) internal successors, (375), 240 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 375 transitions. [2021-11-07 08:15:23,427 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 375 transitions. Word has length 97 [2021-11-07 08:15:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:23,428 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 375 transitions. [2021-11-07 08:15:23,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 375 transitions. [2021-11-07 08:15:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:15:23,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:23,431 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:23,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 08:15:23,431 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:23,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2110285099, now seen corresponding path program 1 times [2021-11-07 08:15:23,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:23,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364334500] [2021-11-07 08:15:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:23,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:15:23,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:23,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364334500] [2021-11-07 08:15:23,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364334500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:23,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:23,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:15:23,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456329809] [2021-11-07 08:15:23,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:15:23,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:15:23,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:23,565 INFO L87 Difference]: Start difference. First operand 241 states and 375 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-11-07 08:15:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:26,557 INFO L93 Difference]: Finished difference Result 482 states and 755 transitions. [2021-11-07 08:15:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:15:26,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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 97 [2021-11-07 08:15:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:26,559 INFO L225 Difference]: With dead ends: 482 [2021-11-07 08:15:26,560 INFO L226 Difference]: Without dead ends: 262 [2021-11-07 08:15:26,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:15:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-07 08:15:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-11-07 08:15:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5423076923076924) internal successors, (401), 260 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 401 transitions. [2021-11-07 08:15:26,571 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 401 transitions. Word has length 97 [2021-11-07 08:15:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:26,572 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 401 transitions. [2021-11-07 08:15:26,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-11-07 08:15:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 401 transitions. [2021-11-07 08:15:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:15:26,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:26,574 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-07 08:15:26,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 08:15:26,575 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash 974418804, now seen corresponding path program 1 times [2021-11-07 08:15:26,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:26,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796228247] [2021-11-07 08:15:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:26,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:26,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:26,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796228247] [2021-11-07 08:15:26,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796228247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:26,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:26,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:26,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307948098] [2021-11-07 08:15:26,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:26,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:26,660 INFO L87 Difference]: Start difference. First operand 261 states and 401 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:28,945 INFO L93 Difference]: Finished difference Result 561 states and 861 transitions. [2021-11-07 08:15:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:15:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:28,948 INFO L225 Difference]: With dead ends: 561 [2021-11-07 08:15:28,948 INFO L226 Difference]: Without dead ends: 321 [2021-11-07 08:15:28,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-07 08:15:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 261. [2021-11-07 08:15:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5384615384615385) internal successors, (400), 260 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 400 transitions. [2021-11-07 08:15:28,961 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 400 transitions. Word has length 97 [2021-11-07 08:15:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:28,961 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 400 transitions. [2021-11-07 08:15:28,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 400 transitions. [2021-11-07 08:15:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:15:28,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:28,964 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:28,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 08:15:28,964 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:28,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1999695180, now seen corresponding path program 1 times [2021-11-07 08:15:28,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:28,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734840850] [2021-11-07 08:15:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:28,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:29,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:29,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734840850] [2021-11-07 08:15:29,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734840850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:29,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:29,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:29,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663503312] [2021-11-07 08:15:29,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:29,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:29,051 INFO L87 Difference]: Start difference. First operand 261 states and 400 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:31,004 INFO L93 Difference]: Finished difference Result 559 states and 857 transitions. [2021-11-07 08:15:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:31,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:15:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:31,008 INFO L225 Difference]: With dead ends: 559 [2021-11-07 08:15:31,008 INFO L226 Difference]: Without dead ends: 319 [2021-11-07 08:15:31,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-07 08:15:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 261. [2021-11-07 08:15:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5346153846153847) internal successors, (399), 260 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 399 transitions. [2021-11-07 08:15:31,022 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 399 transitions. Word has length 97 [2021-11-07 08:15:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:31,023 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 399 transitions. [2021-11-07 08:15:31,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 399 transitions. [2021-11-07 08:15:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:15:31,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:31,025 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-07 08:15:31,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 08:15:31,026 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1850437810, now seen corresponding path program 1 times [2021-11-07 08:15:31,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:31,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030020065] [2021-11-07 08:15:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:31,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:31,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:31,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030020065] [2021-11-07 08:15:31,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030020065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:31,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:31,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:31,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262454323] [2021-11-07 08:15:31,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:31,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:31,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:31,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:31,182 INFO L87 Difference]: Start difference. First operand 261 states and 399 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:33,568 INFO L93 Difference]: Finished difference Result 525 states and 804 transitions. [2021-11-07 08:15:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:33,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:15:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:33,571 INFO L225 Difference]: With dead ends: 525 [2021-11-07 08:15:33,571 INFO L226 Difference]: Without dead ends: 285 [2021-11-07 08:15:33,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-07 08:15:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 261. [2021-11-07 08:15:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5307692307692307) internal successors, (398), 260 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 398 transitions. [2021-11-07 08:15:33,582 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 398 transitions. Word has length 97 [2021-11-07 08:15:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:33,583 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 398 transitions. [2021-11-07 08:15:33,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 398 transitions. [2021-11-07 08:15:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:15:33,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:33,585 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:33,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 08:15:33,586 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1123676174, now seen corresponding path program 1 times [2021-11-07 08:15:33,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:33,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595019947] [2021-11-07 08:15:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:33,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:33,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:33,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595019947] [2021-11-07 08:15:33,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595019947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:33,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:33,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:33,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610783165] [2021-11-07 08:15:33,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:33,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:33,681 INFO L87 Difference]: Start difference. First operand 261 states and 398 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:36,017 INFO L93 Difference]: Finished difference Result 523 states and 800 transitions. [2021-11-07 08:15:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:15:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:36,020 INFO L225 Difference]: With dead ends: 523 [2021-11-07 08:15:36,020 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 08:15:36,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 08:15:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 261. [2021-11-07 08:15:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5269230769230768) internal successors, (397), 260 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 397 transitions. [2021-11-07 08:15:36,033 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 397 transitions. Word has length 97 [2021-11-07 08:15:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:36,034 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 397 transitions. [2021-11-07 08:15:36,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 397 transitions. [2021-11-07 08:15:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:15:36,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:36,036 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:36,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 08:15:36,037 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1722037210, now seen corresponding path program 1 times [2021-11-07 08:15:36,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:36,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75389514] [2021-11-07 08:15:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:36,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:36,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:36,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75389514] [2021-11-07 08:15:36,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75389514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:36,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:36,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:36,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698154656] [2021-11-07 08:15:36,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:36,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:36,118 INFO L87 Difference]: Start difference. First operand 261 states and 397 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:38,585 INFO L93 Difference]: Finished difference Result 559 states and 851 transitions. [2021-11-07 08:15:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 08:15:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:38,588 INFO L225 Difference]: With dead ends: 559 [2021-11-07 08:15:38,588 INFO L226 Difference]: Without dead ends: 319 [2021-11-07 08:15:38,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-07 08:15:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 261. [2021-11-07 08:15:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.523076923076923) internal successors, (396), 260 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 396 transitions. [2021-11-07 08:15:38,634 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 396 transitions. Word has length 98 [2021-11-07 08:15:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:38,635 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 396 transitions. [2021-11-07 08:15:38,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 396 transitions. [2021-11-07 08:15:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:15:38,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:38,637 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:38,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 08:15:38,638 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1186144676, now seen corresponding path program 1 times [2021-11-07 08:15:38,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:38,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175997565] [2021-11-07 08:15:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:38,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:38,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175997565] [2021-11-07 08:15:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175997565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:38,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:38,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:38,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769571750] [2021-11-07 08:15:38,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:38,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:38,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:38,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:38,719 INFO L87 Difference]: Start difference. First operand 261 states and 396 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:40,126 INFO L93 Difference]: Finished difference Result 523 states and 796 transitions. [2021-11-07 08:15:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 08:15:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:40,129 INFO L225 Difference]: With dead ends: 523 [2021-11-07 08:15:40,129 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 08:15:40,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 08:15:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 261. [2021-11-07 08:15:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5192307692307692) internal successors, (395), 260 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 395 transitions. [2021-11-07 08:15:40,142 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 395 transitions. Word has length 98 [2021-11-07 08:15:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:40,143 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 395 transitions. [2021-11-07 08:15:40,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 395 transitions. [2021-11-07 08:15:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:15:40,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:40,145 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:40,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 08:15:40,146 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:40,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1908895064, now seen corresponding path program 1 times [2021-11-07 08:15:40,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:40,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286888297] [2021-11-07 08:15:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:40,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:40,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:40,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286888297] [2021-11-07 08:15:40,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286888297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:40,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:40,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595590189] [2021-11-07 08:15:40,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:40,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:40,238 INFO L87 Difference]: Start difference. First operand 261 states and 395 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-11-07 08:15:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:42,754 INFO L93 Difference]: Finished difference Result 559 states and 847 transitions. [2021-11-07 08:15:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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 99 [2021-11-07 08:15:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:42,757 INFO L225 Difference]: With dead ends: 559 [2021-11-07 08:15:42,758 INFO L226 Difference]: Without dead ends: 319 [2021-11-07 08:15:42,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-07 08:15:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 261. [2021-11-07 08:15:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5153846153846153) internal successors, (394), 260 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 394 transitions. [2021-11-07 08:15:42,769 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 394 transitions. Word has length 99 [2021-11-07 08:15:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:42,770 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 394 transitions. [2021-11-07 08:15:42,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-11-07 08:15:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 394 transitions. [2021-11-07 08:15:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:15:42,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:42,772 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:42,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 08:15:42,773 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1949569814, now seen corresponding path program 1 times [2021-11-07 08:15:42,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:42,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317440334] [2021-11-07 08:15:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:42,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:42,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:42,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317440334] [2021-11-07 08:15:42,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317440334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:42,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:42,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:42,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289681643] [2021-11-07 08:15:42,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:42,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:42,855 INFO L87 Difference]: Start difference. First operand 261 states and 394 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-11-07 08:15:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:43,671 INFO L93 Difference]: Finished difference Result 523 states and 792 transitions. [2021-11-07 08:15:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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 99 [2021-11-07 08:15:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:43,674 INFO L225 Difference]: With dead ends: 523 [2021-11-07 08:15:43,674 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 08:15:43,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 08:15:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 261. [2021-11-07 08:15:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5115384615384615) internal successors, (393), 260 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 393 transitions. [2021-11-07 08:15:43,687 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 393 transitions. Word has length 99 [2021-11-07 08:15:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:43,688 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 393 transitions. [2021-11-07 08:15:43,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-11-07 08:15:43,688 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 393 transitions. [2021-11-07 08:15:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:15:43,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:43,690 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:43,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 08:15:43,691 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash 376316639, now seen corresponding path program 1 times [2021-11-07 08:15:43,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:43,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277180266] [2021-11-07 08:15:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:43,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:43,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:43,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277180266] [2021-11-07 08:15:43,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277180266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:43,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:43,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:43,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333219553] [2021-11-07 08:15:43,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:43,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:43,782 INFO L87 Difference]: Start difference. First operand 261 states and 393 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:46,348 INFO L93 Difference]: Finished difference Result 559 states and 843 transitions. [2021-11-07 08:15:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 100 [2021-11-07 08:15:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:46,351 INFO L225 Difference]: With dead ends: 559 [2021-11-07 08:15:46,351 INFO L226 Difference]: Without dead ends: 319 [2021-11-07 08:15:46,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-07 08:15:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 261. [2021-11-07 08:15:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5076923076923077) internal successors, (392), 260 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 392 transitions. [2021-11-07 08:15:46,366 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 392 transitions. Word has length 100 [2021-11-07 08:15:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:46,366 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 392 transitions. [2021-11-07 08:15:46,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 392 transitions. [2021-11-07 08:15:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:15:46,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:46,369 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:46,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 08:15:46,369 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1637233889, now seen corresponding path program 1 times [2021-11-07 08:15:46,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:46,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322819098] [2021-11-07 08:15:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:46,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:46,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:46,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322819098] [2021-11-07 08:15:46,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322819098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:46,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:46,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:46,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057583064] [2021-11-07 08:15:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:46,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:46,465 INFO L87 Difference]: Start difference. First operand 261 states and 392 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:48,960 INFO L93 Difference]: Finished difference Result 523 states and 788 transitions. [2021-11-07 08:15:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 100 [2021-11-07 08:15:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:48,963 INFO L225 Difference]: With dead ends: 523 [2021-11-07 08:15:48,963 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 08:15:48,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 08:15:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 261. [2021-11-07 08:15:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5038461538461538) internal successors, (391), 260 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 391 transitions. [2021-11-07 08:15:48,976 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 391 transitions. Word has length 100 [2021-11-07 08:15:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:48,977 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 391 transitions. [2021-11-07 08:15:48,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 391 transitions. [2021-11-07 08:15:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 08:15:48,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:48,979 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:48,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-07 08:15:48,980 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1375788413, now seen corresponding path program 1 times [2021-11-07 08:15:48,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:48,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094743463] [2021-11-07 08:15:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:48,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:49,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:49,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094743463] [2021-11-07 08:15:49,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094743463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:49,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:49,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:49,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147637041] [2021-11-07 08:15:49,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:49,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:49,090 INFO L87 Difference]: Start difference. First operand 261 states and 391 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:51,540 INFO L93 Difference]: Finished difference Result 549 states and 827 transitions. [2021-11-07 08:15:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 08:15:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:51,543 INFO L225 Difference]: With dead ends: 549 [2021-11-07 08:15:51,543 INFO L226 Difference]: Without dead ends: 309 [2021-11-07 08:15:51,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-07 08:15:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 261. [2021-11-07 08:15:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5) internal successors, (390), 260 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 390 transitions. [2021-11-07 08:15:51,555 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 390 transitions. Word has length 101 [2021-11-07 08:15:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:51,556 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 390 transitions. [2021-11-07 08:15:51,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 390 transitions. [2021-11-07 08:15:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 08:15:51,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:51,558 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:51,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-07 08:15:51,559 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:51,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1809517499, now seen corresponding path program 1 times [2021-11-07 08:15:51,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:51,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476724933] [2021-11-07 08:15:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:51,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:51,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:51,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476724933] [2021-11-07 08:15:51,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476724933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:51,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:51,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:51,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622453916] [2021-11-07 08:15:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:51,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:51,643 INFO L87 Difference]: Start difference. First operand 261 states and 390 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:53,137 INFO L93 Difference]: Finished difference Result 513 states and 772 transitions. [2021-11-07 08:15:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 08:15:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:53,140 INFO L225 Difference]: With dead ends: 513 [2021-11-07 08:15:53,140 INFO L226 Difference]: Without dead ends: 273 [2021-11-07 08:15:53,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-07 08:15:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 261. [2021-11-07 08:15:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.4961538461538462) internal successors, (389), 260 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 389 transitions. [2021-11-07 08:15:53,153 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 389 transitions. Word has length 101 [2021-11-07 08:15:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:53,154 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 389 transitions. [2021-11-07 08:15:53,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 389 transitions. [2021-11-07 08:15:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:15:53,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:53,156 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:53,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-07 08:15:53,157 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1598793719, now seen corresponding path program 1 times [2021-11-07 08:15:53,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:53,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091964845] [2021-11-07 08:15:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:53,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:53,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:53,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091964845] [2021-11-07 08:15:53,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091964845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:53,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:53,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:53,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621658188] [2021-11-07 08:15:53,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:53,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:53,251 INFO L87 Difference]: Start difference. First operand 261 states and 389 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:55,695 INFO L93 Difference]: Finished difference Result 549 states and 823 transitions. [2021-11-07 08:15:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 08:15:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:55,699 INFO L225 Difference]: With dead ends: 549 [2021-11-07 08:15:55,699 INFO L226 Difference]: Without dead ends: 309 [2021-11-07 08:15:55,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-07 08:15:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 261. [2021-11-07 08:15:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.4923076923076923) internal successors, (388), 260 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 388 transitions. [2021-11-07 08:15:55,712 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 388 transitions. Word has length 105 [2021-11-07 08:15:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:55,713 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 388 transitions. [2021-11-07 08:15:55,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 388 transitions. [2021-11-07 08:15:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:15:55,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:55,715 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:15:55,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-07 08:15:55,716 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2016901323, now seen corresponding path program 1 times [2021-11-07 08:15:55,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:55,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913259830] [2021-11-07 08:15:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:55,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:15:55,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:55,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913259830] [2021-11-07 08:15:55,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913259830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:55,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:55,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:55,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353594344] [2021-11-07 08:15:55,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:55,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:55,813 INFO L87 Difference]: Start difference. First operand 261 states and 388 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:56,848 INFO L93 Difference]: Finished difference Result 554 states and 832 transitions. [2021-11-07 08:15:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:56,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 08:15:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:56,851 INFO L225 Difference]: With dead ends: 554 [2021-11-07 08:15:56,851 INFO L226 Difference]: Without dead ends: 314 [2021-11-07 08:15:56,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-07 08:15:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 287. [2021-11-07 08:15:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.513986013986014) internal successors, (433), 286 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 433 transitions. [2021-11-07 08:15:56,865 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 433 transitions. Word has length 105 [2021-11-07 08:15:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:56,865 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 433 transitions. [2021-11-07 08:15:56,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 433 transitions. [2021-11-07 08:15:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 08:15:56,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:56,868 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:56,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-07 08:15:56,868 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash -744916743, now seen corresponding path program 1 times [2021-11-07 08:15:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:56,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375928649] [2021-11-07 08:15:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:56,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:56,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:56,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375928649] [2021-11-07 08:15:56,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375928649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:56,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:56,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:56,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829903187] [2021-11-07 08:15:56,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:56,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:56,975 INFO L87 Difference]: Start difference. First operand 287 states and 433 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:57,910 INFO L93 Difference]: Finished difference Result 601 states and 911 transitions. [2021-11-07 08:15:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 08:15:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:57,912 INFO L225 Difference]: With dead ends: 601 [2021-11-07 08:15:57,912 INFO L226 Difference]: Without dead ends: 335 [2021-11-07 08:15:57,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-07 08:15:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 287. [2021-11-07 08:15:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.5104895104895104) internal successors, (432), 286 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 432 transitions. [2021-11-07 08:15:57,924 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 432 transitions. Word has length 108 [2021-11-07 08:15:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:57,925 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 432 transitions. [2021-11-07 08:15:57,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 432 transitions. [2021-11-07 08:15:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 08:15:57,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:57,927 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:57,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-07 08:15:57,928 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 125964791, now seen corresponding path program 1 times [2021-11-07 08:15:57,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:57,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765072245] [2021-11-07 08:15:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:57,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:58,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:58,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765072245] [2021-11-07 08:15:58,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765072245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:58,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:58,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:58,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545456384] [2021-11-07 08:15:58,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:58,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:58,038 INFO L87 Difference]: Start difference. First operand 287 states and 432 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:59,631 INFO L93 Difference]: Finished difference Result 593 states and 896 transitions. [2021-11-07 08:15:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:15:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-07 08:15:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:59,633 INFO L225 Difference]: With dead ends: 593 [2021-11-07 08:15:59,633 INFO L226 Difference]: Without dead ends: 327 [2021-11-07 08:15:59,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-07 08:15:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 287. [2021-11-07 08:15:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.506993006993007) internal successors, (431), 286 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 431 transitions. [2021-11-07 08:15:59,643 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 431 transitions. Word has length 109 [2021-11-07 08:15:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:59,643 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 431 transitions. [2021-11-07 08:15:59,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 431 transitions. [2021-11-07 08:15:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 08:15:59,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:59,645 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:59,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-07 08:15:59,645 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:59,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1474789127, now seen corresponding path program 1 times [2021-11-07 08:15:59,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:59,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442579617] [2021-11-07 08:15:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:59,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:15:59,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:59,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442579617] [2021-11-07 08:15:59,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442579617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:59,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:59,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:15:59,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656362390] [2021-11-07 08:15:59,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:15:59,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:15:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:15:59,716 INFO L87 Difference]: Start difference. First operand 287 states and 431 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:01,025 INFO L93 Difference]: Finished difference Result 593 states and 894 transitions. [2021-11-07 08:16:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 110 [2021-11-07 08:16:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:01,030 INFO L225 Difference]: With dead ends: 593 [2021-11-07 08:16:01,031 INFO L226 Difference]: Without dead ends: 327 [2021-11-07 08:16:01,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-07 08:16:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 287. [2021-11-07 08:16:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.5034965034965035) internal successors, (430), 286 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 430 transitions. [2021-11-07 08:16:01,039 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 430 transitions. Word has length 110 [2021-11-07 08:16:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:01,040 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 430 transitions. [2021-11-07 08:16:01,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 430 transitions. [2021-11-07 08:16:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 08:16:01,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:01,042 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:01,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-07 08:16:01,042 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:01,043 INFO L85 PathProgramCache]: Analyzing trace with hash -165138014, now seen corresponding path program 1 times [2021-11-07 08:16:01,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:01,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074927189] [2021-11-07 08:16:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:01,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:01,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:01,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074927189] [2021-11-07 08:16:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074927189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:01,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:01,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985383507] [2021-11-07 08:16:01,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:01,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:01,124 INFO L87 Difference]: Start difference. First operand 287 states and 430 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:03,126 INFO L93 Difference]: Finished difference Result 593 states and 892 transitions. [2021-11-07 08:16:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 08:16:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:03,128 INFO L225 Difference]: With dead ends: 593 [2021-11-07 08:16:03,128 INFO L226 Difference]: Without dead ends: 327 [2021-11-07 08:16:03,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-07 08:16:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 287. [2021-11-07 08:16:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.5) internal successors, (429), 286 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 429 transitions. [2021-11-07 08:16:03,138 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 429 transitions. Word has length 111 [2021-11-07 08:16:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:03,138 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 429 transitions. [2021-11-07 08:16:03,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 429 transitions. [2021-11-07 08:16:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 08:16:03,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:03,140 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:03,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-07 08:16:03,141 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:03,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1750709015, now seen corresponding path program 1 times [2021-11-07 08:16:03,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:03,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932923087] [2021-11-07 08:16:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:03,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:03,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:03,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932923087] [2021-11-07 08:16:03,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932923087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:03,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:03,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:03,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057843899] [2021-11-07 08:16:03,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:03,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:03,209 INFO L87 Difference]: Start difference. First operand 287 states and 429 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:04,332 INFO L93 Difference]: Finished difference Result 591 states and 888 transitions. [2021-11-07 08:16:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 08:16:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:04,334 INFO L225 Difference]: With dead ends: 591 [2021-11-07 08:16:04,334 INFO L226 Difference]: Without dead ends: 325 [2021-11-07 08:16:04,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-07 08:16:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 287. [2021-11-07 08:16:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4965034965034965) internal successors, (428), 286 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 428 transitions. [2021-11-07 08:16:04,345 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 428 transitions. Word has length 111 [2021-11-07 08:16:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:04,345 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 428 transitions. [2021-11-07 08:16:04,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 428 transitions. [2021-11-07 08:16:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 08:16:04,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:04,347 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:04,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-07 08:16:04,348 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -888523644, now seen corresponding path program 1 times [2021-11-07 08:16:04,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:04,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189630552] [2021-11-07 08:16:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:04,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:04,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:04,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189630552] [2021-11-07 08:16:04,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189630552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:04,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:04,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:04,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306858545] [2021-11-07 08:16:04,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:04,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:04,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:04,425 INFO L87 Difference]: Start difference. First operand 287 states and 428 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:05,871 INFO L93 Difference]: Finished difference Result 589 states and 883 transitions. [2021-11-07 08:16:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:05,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-11-07 08:16:05,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:05,873 INFO L225 Difference]: With dead ends: 589 [2021-11-07 08:16:05,873 INFO L226 Difference]: Without dead ends: 323 [2021-11-07 08:16:05,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-07 08:16:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 287. [2021-11-07 08:16:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.493006993006993) internal successors, (427), 286 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 427 transitions. [2021-11-07 08:16:05,882 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 427 transitions. Word has length 112 [2021-11-07 08:16:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:05,882 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 427 transitions. [2021-11-07 08:16:05,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 427 transitions. [2021-11-07 08:16:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 08:16:05,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:05,883 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:05,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-07 08:16:05,883 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 374028283, now seen corresponding path program 1 times [2021-11-07 08:16:05,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:05,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807265725] [2021-11-07 08:16:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:05,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:05,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:05,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807265725] [2021-11-07 08:16:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807265725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:05,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:05,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561399461] [2021-11-07 08:16:05,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:05,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:05,952 INFO L87 Difference]: Start difference. First operand 287 states and 427 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:07,908 INFO L93 Difference]: Finished difference Result 586 states and 877 transitions. [2021-11-07 08:16:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-11-07 08:16:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:07,911 INFO L225 Difference]: With dead ends: 586 [2021-11-07 08:16:07,911 INFO L226 Difference]: Without dead ends: 320 [2021-11-07 08:16:07,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-07 08:16:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 287. [2021-11-07 08:16:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4895104895104896) internal successors, (426), 286 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 426 transitions. [2021-11-07 08:16:07,921 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 426 transitions. Word has length 112 [2021-11-07 08:16:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:07,922 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 426 transitions. [2021-11-07 08:16:07,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 426 transitions. [2021-11-07 08:16:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 08:16:07,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:07,924 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:07,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-07 08:16:07,924 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash 590041503, now seen corresponding path program 1 times [2021-11-07 08:16:07,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:07,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359049408] [2021-11-07 08:16:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:07,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:07,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:07,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359049408] [2021-11-07 08:16:07,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359049408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:07,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:07,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:07,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983811169] [2021-11-07 08:16:07,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:07,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:07,996 INFO L87 Difference]: Start difference. First operand 287 states and 426 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:10,271 INFO L93 Difference]: Finished difference Result 586 states and 875 transitions. [2021-11-07 08:16:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-07 08:16:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:10,273 INFO L225 Difference]: With dead ends: 586 [2021-11-07 08:16:10,273 INFO L226 Difference]: Without dead ends: 320 [2021-11-07 08:16:10,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-07 08:16:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 287. [2021-11-07 08:16:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.486013986013986) internal successors, (425), 286 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 425 transitions. [2021-11-07 08:16:10,284 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 425 transitions. Word has length 115 [2021-11-07 08:16:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:10,284 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 425 transitions. [2021-11-07 08:16:10,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 425 transitions. [2021-11-07 08:16:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 08:16:10,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:10,286 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:10,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-07 08:16:10,286 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 924043110, now seen corresponding path program 1 times [2021-11-07 08:16:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955048495] [2021-11-07 08:16:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:10,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:10,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:10,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955048495] [2021-11-07 08:16:10,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955048495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:10,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:10,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:10,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078383974] [2021-11-07 08:16:10,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:10,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:10,366 INFO L87 Difference]: Start difference. First operand 287 states and 425 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:12,266 INFO L93 Difference]: Finished difference Result 580 states and 864 transitions. [2021-11-07 08:16:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 08:16:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:12,268 INFO L225 Difference]: With dead ends: 580 [2021-11-07 08:16:12,268 INFO L226 Difference]: Without dead ends: 314 [2021-11-07 08:16:12,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:12,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-07 08:16:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 287. [2021-11-07 08:16:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4825174825174825) internal successors, (424), 286 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 424 transitions. [2021-11-07 08:16:12,277 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 424 transitions. Word has length 116 [2021-11-07 08:16:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:12,278 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 424 transitions. [2021-11-07 08:16:12,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 424 transitions. [2021-11-07 08:16:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 08:16:12,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:12,280 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:12,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-07 08:16:12,280 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:12,281 INFO L85 PathProgramCache]: Analyzing trace with hash -42530902, now seen corresponding path program 1 times [2021-11-07 08:16:12,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:12,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451490309] [2021-11-07 08:16:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:12,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:12,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:12,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451490309] [2021-11-07 08:16:12,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451490309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:12,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:12,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:12,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097936129] [2021-11-07 08:16:12,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:12,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:12,352 INFO L87 Difference]: Start difference. First operand 287 states and 424 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:13,826 INFO L93 Difference]: Finished difference Result 580 states and 862 transitions. [2021-11-07 08:16:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 08:16:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:13,831 INFO L225 Difference]: With dead ends: 580 [2021-11-07 08:16:13,831 INFO L226 Difference]: Without dead ends: 314 [2021-11-07 08:16:13,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-07 08:16:13,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 287. [2021-11-07 08:16:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.479020979020979) internal successors, (423), 286 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 423 transitions. [2021-11-07 08:16:13,845 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 423 transitions. Word has length 116 [2021-11-07 08:16:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:13,845 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 423 transitions. [2021-11-07 08:16:13,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 423 transitions. [2021-11-07 08:16:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:16:13,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:13,848 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:13,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-07 08:16:13,851 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash 98467363, now seen corresponding path program 1 times [2021-11-07 08:16:13,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:13,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951687038] [2021-11-07 08:16:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:13,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:13,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:13,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951687038] [2021-11-07 08:16:13,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951687038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:13,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:13,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:13,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960489860] [2021-11-07 08:16:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:13,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:13,947 INFO L87 Difference]: Start difference. First operand 287 states and 423 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:15,664 INFO L93 Difference]: Finished difference Result 577 states and 856 transitions. [2021-11-07 08:16:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 08:16:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:15,667 INFO L225 Difference]: With dead ends: 577 [2021-11-07 08:16:15,667 INFO L226 Difference]: Without dead ends: 311 [2021-11-07 08:16:15,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-07 08:16:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-11-07 08:16:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4755244755244756) internal successors, (422), 286 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 422 transitions. [2021-11-07 08:16:15,679 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 422 transitions. Word has length 117 [2021-11-07 08:16:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:15,679 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 422 transitions. [2021-11-07 08:16:15,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 422 transitions. [2021-11-07 08:16:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 08:16:15,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:15,681 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:15,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-07 08:16:15,682 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash -183248622, now seen corresponding path program 1 times [2021-11-07 08:16:15,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:15,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507754832] [2021-11-07 08:16:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:15,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:15,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:15,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507754832] [2021-11-07 08:16:15,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507754832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:15,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:15,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:15,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160805221] [2021-11-07 08:16:15,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:15,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:15,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:15,763 INFO L87 Difference]: Start difference. First operand 287 states and 422 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:17,521 INFO L93 Difference]: Finished difference Result 577 states and 854 transitions. [2021-11-07 08:16:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 08:16:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:17,524 INFO L225 Difference]: With dead ends: 577 [2021-11-07 08:16:17,524 INFO L226 Difference]: Without dead ends: 311 [2021-11-07 08:16:17,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-07 08:16:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-11-07 08:16:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.472027972027972) internal successors, (421), 286 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 421 transitions. [2021-11-07 08:16:17,533 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 421 transitions. Word has length 118 [2021-11-07 08:16:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:17,533 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 421 transitions. [2021-11-07 08:16:17,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 421 transitions. [2021-11-07 08:16:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 08:16:17,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:17,535 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:17,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-07 08:16:17,535 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1299031558, now seen corresponding path program 1 times [2021-11-07 08:16:17,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:17,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626816905] [2021-11-07 08:16:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:17,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-07 08:16:17,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:17,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626816905] [2021-11-07 08:16:17,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626816905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:17,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:17,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:17,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564256873] [2021-11-07 08:16:17,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:17,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:17,612 INFO L87 Difference]: Start difference. First operand 287 states and 421 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:19,627 INFO L93 Difference]: Finished difference Result 625 states and 929 transitions. [2021-11-07 08:16:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:19,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 08:16:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:19,632 INFO L225 Difference]: With dead ends: 625 [2021-11-07 08:16:19,632 INFO L226 Difference]: Without dead ends: 359 [2021-11-07 08:16:19,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-07 08:16:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 319. [2021-11-07 08:16:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.5031446540880504) internal successors, (478), 318 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 478 transitions. [2021-11-07 08:16:19,641 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 478 transitions. Word has length 118 [2021-11-07 08:16:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:19,641 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 478 transitions. [2021-11-07 08:16:19,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 478 transitions. [2021-11-07 08:16:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 08:16:19,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:19,642 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:19,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-07 08:16:19,643 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash 548980907, now seen corresponding path program 1 times [2021-11-07 08:16:19,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:19,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088780433] [2021-11-07 08:16:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:19,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:19,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:19,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088780433] [2021-11-07 08:16:19,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088780433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:19,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:19,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:19,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968124080] [2021-11-07 08:16:19,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:19,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:19,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:19,722 INFO L87 Difference]: Start difference. First operand 319 states and 478 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:22,027 INFO L93 Difference]: Finished difference Result 638 states and 962 transitions. [2021-11-07 08:16:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 119 [2021-11-07 08:16:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:22,029 INFO L225 Difference]: With dead ends: 638 [2021-11-07 08:16:22,029 INFO L226 Difference]: Without dead ends: 340 [2021-11-07 08:16:22,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-07 08:16:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 319. [2021-11-07 08:16:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.5) internal successors, (477), 318 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 477 transitions. [2021-11-07 08:16:22,040 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 477 transitions. Word has length 119 [2021-11-07 08:16:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:22,041 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 477 transitions. [2021-11-07 08:16:22,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 477 transitions. [2021-11-07 08:16:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 08:16:22,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:22,042 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:22,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-07 08:16:22,043 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash 246268528, now seen corresponding path program 1 times [2021-11-07 08:16:22,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:22,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815279207] [2021-11-07 08:16:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:22,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:22,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:22,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815279207] [2021-11-07 08:16:22,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815279207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:22,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:22,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:22,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98664116] [2021-11-07 08:16:22,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:22,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:22,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:22,116 INFO L87 Difference]: Start difference. First operand 319 states and 477 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:22,918 INFO L93 Difference]: Finished difference Result 725 states and 1097 transitions. [2021-11-07 08:16:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 119 [2021-11-07 08:16:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:22,922 INFO L225 Difference]: With dead ends: 725 [2021-11-07 08:16:22,922 INFO L226 Difference]: Without dead ends: 427 [2021-11-07 08:16:22,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-07 08:16:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 358. [2021-11-07 08:16:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.535014005602241) internal successors, (548), 357 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 548 transitions. [2021-11-07 08:16:22,935 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 548 transitions. Word has length 119 [2021-11-07 08:16:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:22,936 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 548 transitions. [2021-11-07 08:16:22,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 548 transitions. [2021-11-07 08:16:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:16:22,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:22,938 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:22,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-07 08:16:22,938 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash 624215134, now seen corresponding path program 1 times [2021-11-07 08:16:22,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:22,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108414269] [2021-11-07 08:16:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:22,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:23,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:23,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108414269] [2021-11-07 08:16:23,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108414269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:23,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:23,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:23,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589656885] [2021-11-07 08:16:23,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:23,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:23,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:23,032 INFO L87 Difference]: Start difference. First operand 358 states and 548 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:23,773 INFO L93 Difference]: Finished difference Result 722 states and 1106 transitions. [2021-11-07 08:16:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 08:16:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:23,777 INFO L225 Difference]: With dead ends: 722 [2021-11-07 08:16:23,777 INFO L226 Difference]: Without dead ends: 385 [2021-11-07 08:16:23,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-07 08:16:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 358. [2021-11-07 08:16:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.5322128851540617) internal successors, (547), 357 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 547 transitions. [2021-11-07 08:16:23,792 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 547 transitions. Word has length 120 [2021-11-07 08:16:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 547 transitions. [2021-11-07 08:16:23,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 547 transitions. [2021-11-07 08:16:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:16:23,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:23,795 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:23,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-07 08:16:23,795 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1196806519, now seen corresponding path program 1 times [2021-11-07 08:16:23,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:23,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918586108] [2021-11-07 08:16:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:23,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:23,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:23,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918586108] [2021-11-07 08:16:23,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918586108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:23,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:23,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:23,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001426638] [2021-11-07 08:16:23,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:23,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:23,867 INFO L87 Difference]: Start difference. First operand 358 states and 547 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:25,545 INFO L93 Difference]: Finished difference Result 757 states and 1156 transitions. [2021-11-07 08:16:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:25,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 120 [2021-11-07 08:16:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:25,550 INFO L225 Difference]: With dead ends: 757 [2021-11-07 08:16:25,551 INFO L226 Difference]: Without dead ends: 420 [2021-11-07 08:16:25,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-07 08:16:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 357. [2021-11-07 08:16:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.5337078651685394) internal successors, (546), 356 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 546 transitions. [2021-11-07 08:16:25,567 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 546 transitions. Word has length 120 [2021-11-07 08:16:25,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:25,567 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 546 transitions. [2021-11-07 08:16:25,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 546 transitions. [2021-11-07 08:16:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 08:16:25,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:25,569 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:25,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-07 08:16:25,570 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2058818220, now seen corresponding path program 1 times [2021-11-07 08:16:25,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:25,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351096601] [2021-11-07 08:16:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:25,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:25,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:25,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351096601] [2021-11-07 08:16:25,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351096601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:25,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:25,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:25,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224727064] [2021-11-07 08:16:25,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:25,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:25,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:25,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:25,656 INFO L87 Difference]: Start difference. First operand 357 states and 546 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:27,950 INFO L93 Difference]: Finished difference Result 720 states and 1102 transitions. [2021-11-07 08:16:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 08:16:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:27,952 INFO L225 Difference]: With dead ends: 720 [2021-11-07 08:16:27,952 INFO L226 Difference]: Without dead ends: 384 [2021-11-07 08:16:27,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-07 08:16:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 357. [2021-11-07 08:16:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.5308988764044944) internal successors, (545), 356 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 545 transitions. [2021-11-07 08:16:27,960 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 545 transitions. Word has length 121 [2021-11-07 08:16:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:27,961 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 545 transitions. [2021-11-07 08:16:27,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 545 transitions. [2021-11-07 08:16:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 08:16:27,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:27,962 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:27,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-07 08:16:27,963 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1931256419, now seen corresponding path program 1 times [2021-11-07 08:16:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377310710] [2021-11-07 08:16:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:27,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:28,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:28,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377310710] [2021-11-07 08:16:28,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377310710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:28,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:28,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:28,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81206232] [2021-11-07 08:16:28,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:28,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:28,045 INFO L87 Difference]: Start difference. First operand 357 states and 545 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:28,776 INFO L93 Difference]: Finished difference Result 720 states and 1100 transitions. [2021-11-07 08:16:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-07 08:16:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:28,778 INFO L225 Difference]: With dead ends: 720 [2021-11-07 08:16:28,779 INFO L226 Difference]: Without dead ends: 384 [2021-11-07 08:16:28,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-07 08:16:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 357. [2021-11-07 08:16:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.5280898876404494) internal successors, (544), 356 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 544 transitions. [2021-11-07 08:16:28,789 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 544 transitions. Word has length 122 [2021-11-07 08:16:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:28,789 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 544 transitions. [2021-11-07 08:16:28,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 544 transitions. [2021-11-07 08:16:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 08:16:28,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:28,791 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:28,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-07 08:16:28,792 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:28,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1960685959, now seen corresponding path program 1 times [2021-11-07 08:16:28,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:28,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205432338] [2021-11-07 08:16:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:28,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:28,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:28,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205432338] [2021-11-07 08:16:28,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205432338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:28,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:28,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:28,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700540949] [2021-11-07 08:16:28,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:28,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:28,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:28,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:28,867 INFO L87 Difference]: Start difference. First operand 357 states and 544 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:31,148 INFO L93 Difference]: Finished difference Result 710 states and 1086 transitions. [2021-11-07 08:16:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 08:16:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:31,151 INFO L225 Difference]: With dead ends: 710 [2021-11-07 08:16:31,152 INFO L226 Difference]: Without dead ends: 374 [2021-11-07 08:16:31,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-07 08:16:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 357. [2021-11-07 08:16:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.5252808988764044) internal successors, (543), 356 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 543 transitions. [2021-11-07 08:16:31,165 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 543 transitions. Word has length 123 [2021-11-07 08:16:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:31,165 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 543 transitions. [2021-11-07 08:16:31,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 543 transitions. [2021-11-07 08:16:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 08:16:31,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:31,166 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:31,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-07 08:16:31,166 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash 980780078, now seen corresponding path program 1 times [2021-11-07 08:16:31,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:31,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397787336] [2021-11-07 08:16:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:31,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:31,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:31,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397787336] [2021-11-07 08:16:31,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397787336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:31,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:31,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:16:31,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107387659] [2021-11-07 08:16:31,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:16:31,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:31,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:16:31,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:16:31,222 INFO L87 Difference]: Start difference. First operand 357 states and 543 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:31,286 INFO L93 Difference]: Finished difference Result 1024 states and 1573 transitions. [2021-11-07 08:16:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:16:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 08:16:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:31,289 INFO L225 Difference]: With dead ends: 1024 [2021-11-07 08:16:31,289 INFO L226 Difference]: Without dead ends: 688 [2021-11-07 08:16:31,289 INFO L786 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 [2021-11-07 08:16:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-11-07 08:16:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 686. [2021-11-07 08:16:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.5167883211678832) internal successors, (1039), 685 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1039 transitions. [2021-11-07 08:16:31,308 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1039 transitions. Word has length 124 [2021-11-07 08:16:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:31,309 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 1039 transitions. [2021-11-07 08:16:31,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1039 transitions. [2021-11-07 08:16:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 08:16:31,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:31,311 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:31,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-07 08:16:31,311 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1989331024, now seen corresponding path program 1 times [2021-11-07 08:16:31,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:31,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473098371] [2021-11-07 08:16:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:31,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 08:16:31,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473098371] [2021-11-07 08:16:31,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473098371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:31,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:31,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:16:31,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007767922] [2021-11-07 08:16:31,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:16:31,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:31,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:16:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:16:31,361 INFO L87 Difference]: Start difference. First operand 686 states and 1039 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:31,423 INFO L93 Difference]: Finished difference Result 1378 states and 2090 transitions. [2021-11-07 08:16:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:16:31,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 08:16:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:31,428 INFO L225 Difference]: With dead ends: 1378 [2021-11-07 08:16:31,428 INFO L226 Difference]: Without dead ends: 713 [2021-11-07 08:16:31,429 INFO L786 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 [2021-11-07 08:16:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-07 08:16:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-11-07 08:16:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.5084269662921348) internal successors, (1074), 712 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1074 transitions. [2021-11-07 08:16:31,456 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1074 transitions. Word has length 124 [2021-11-07 08:16:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:31,456 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1074 transitions. [2021-11-07 08:16:31,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1074 transitions. [2021-11-07 08:16:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 08:16:31,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:31,458 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:31,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-07 08:16:31,463 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash 272242226, now seen corresponding path program 1 times [2021-11-07 08:16:31,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:31,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422290440] [2021-11-07 08:16:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:31,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 08:16:31,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:31,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422290440] [2021-11-07 08:16:31,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422290440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:31,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:31,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:16:31,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648466103] [2021-11-07 08:16:31,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:16:31,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:31,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:16:31,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:16:31,509 INFO L87 Difference]: Start difference. First operand 713 states and 1074 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) [2021-11-07 08:16:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:31,570 INFO L93 Difference]: Finished difference Result 1407 states and 2126 transitions. [2021-11-07 08:16:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:16:31,570 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 124 [2021-11-07 08:16:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:31,575 INFO L225 Difference]: With dead ends: 1407 [2021-11-07 08:16:31,575 INFO L226 Difference]: Without dead ends: 715 [2021-11-07 08:16:31,576 INFO L786 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 [2021-11-07 08:16:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-07 08:16:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 715. [2021-11-07 08:16:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.5070028011204482) internal successors, (1076), 714 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1076 transitions. [2021-11-07 08:16:31,606 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1076 transitions. Word has length 124 [2021-11-07 08:16:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:31,607 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1076 transitions. [2021-11-07 08:16:31,607 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) [2021-11-07 08:16:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1076 transitions. [2021-11-07 08:16:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 08:16:31,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:31,609 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:31,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-07 08:16:31,610 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash 117634714, now seen corresponding path program 1 times [2021-11-07 08:16:31,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:31,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972192366] [2021-11-07 08:16:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:31,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:31,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:31,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972192366] [2021-11-07 08:16:31,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972192366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:31,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:31,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:31,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400281312] [2021-11-07 08:16:31,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:31,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:31,688 INFO L87 Difference]: Start difference. First operand 715 states and 1076 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:33,202 INFO L93 Difference]: Finished difference Result 1619 states and 2446 transitions. [2021-11-07 08:16:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-07 08:16:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:33,208 INFO L225 Difference]: With dead ends: 1619 [2021-11-07 08:16:33,208 INFO L226 Difference]: Without dead ends: 927 [2021-11-07 08:16:33,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-11-07 08:16:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 793. [2021-11-07 08:16:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.5378787878787878) internal successors, (1218), 792 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1218 transitions. [2021-11-07 08:16:33,241 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1218 transitions. Word has length 125 [2021-11-07 08:16:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:33,241 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1218 transitions. [2021-11-07 08:16:33,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1218 transitions. [2021-11-07 08:16:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 08:16:33,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:33,243 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:33,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-07 08:16:33,244 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -889487457, now seen corresponding path program 1 times [2021-11-07 08:16:33,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:33,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805113605] [2021-11-07 08:16:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:33,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:33,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:33,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805113605] [2021-11-07 08:16:33,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805113605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:33,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:33,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:33,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293922788] [2021-11-07 08:16:33,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:33,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:33,311 INFO L87 Difference]: Start difference. First operand 793 states and 1218 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:34,915 INFO L93 Difference]: Finished difference Result 1687 states and 2574 transitions. [2021-11-07 08:16:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 08:16:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:34,922 INFO L225 Difference]: With dead ends: 1687 [2021-11-07 08:16:34,922 INFO L226 Difference]: Without dead ends: 917 [2021-11-07 08:16:34,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-07 08:16:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 715. [2021-11-07 08:16:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.5070028011204482) internal successors, (1076), 714 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1076 transitions. [2021-11-07 08:16:34,945 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1076 transitions. Word has length 126 [2021-11-07 08:16:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:34,945 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1076 transitions. [2021-11-07 08:16:34,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1076 transitions. [2021-11-07 08:16:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 08:16:34,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:34,947 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:34,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-07 08:16:34,947 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash 221454847, now seen corresponding path program 1 times [2021-11-07 08:16:34,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:34,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641716848] [2021-11-07 08:16:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:34,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:16:35,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:35,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641716848] [2021-11-07 08:16:35,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641716848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:35,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:35,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:35,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201304791] [2021-11-07 08:16:35,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:35,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:35,013 INFO L87 Difference]: Start difference. First operand 715 states and 1076 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:35,842 INFO L93 Difference]: Finished difference Result 1439 states and 2166 transitions. [2021-11-07 08:16:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-07 08:16:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:35,845 INFO L225 Difference]: With dead ends: 1439 [2021-11-07 08:16:35,845 INFO L226 Difference]: Without dead ends: 747 [2021-11-07 08:16:35,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-11-07 08:16:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 721. [2021-11-07 08:16:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.5027777777777778) internal successors, (1082), 720 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1082 transitions. [2021-11-07 08:16:35,864 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1082 transitions. Word has length 127 [2021-11-07 08:16:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:35,865 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1082 transitions. [2021-11-07 08:16:35,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1082 transitions. [2021-11-07 08:16:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 08:16:35,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:35,866 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:35,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-07 08:16:35,866 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 747400953, now seen corresponding path program 1 times [2021-11-07 08:16:35,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:35,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653570700] [2021-11-07 08:16:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:35,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-07 08:16:35,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:35,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653570700] [2021-11-07 08:16:35,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653570700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:35,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:35,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:35,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063249537] [2021-11-07 08:16:35,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:35,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:35,930 INFO L87 Difference]: Start difference. First operand 721 states and 1082 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:37,691 INFO L93 Difference]: Finished difference Result 1453 states and 2180 transitions. [2021-11-07 08:16:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:37,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-07 08:16:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:37,695 INFO L225 Difference]: With dead ends: 1453 [2021-11-07 08:16:37,695 INFO L226 Difference]: Without dead ends: 755 [2021-11-07 08:16:37,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-07 08:16:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 721. [2021-11-07 08:16:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.5) internal successors, (1080), 720 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1080 transitions. [2021-11-07 08:16:37,722 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1080 transitions. Word has length 133 [2021-11-07 08:16:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:37,723 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1080 transitions. [2021-11-07 08:16:37,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1080 transitions. [2021-11-07 08:16:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 08:16:37,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:37,725 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-07 08:16:37,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-07 08:16:37,725 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:37,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1721919586, now seen corresponding path program 1 times [2021-11-07 08:16:37,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:37,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780667049] [2021-11-07 08:16:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:37,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 08:16:37,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:37,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780667049] [2021-11-07 08:16:37,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780667049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:37,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:37,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:37,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516873407] [2021-11-07 08:16:37,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:37,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:37,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:37,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:37,802 INFO L87 Difference]: Start difference. First operand 721 states and 1080 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-11-07 08:16:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:38,482 INFO L93 Difference]: Finished difference Result 1545 states and 2326 transitions. [2021-11-07 08:16:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:38,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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 133 [2021-11-07 08:16:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:38,486 INFO L225 Difference]: With dead ends: 1545 [2021-11-07 08:16:38,486 INFO L226 Difference]: Without dead ends: 847 [2021-11-07 08:16:38,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-07 08:16:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 777. [2021-11-07 08:16:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.518041237113402) internal successors, (1178), 776 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1178 transitions. [2021-11-07 08:16:38,506 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1178 transitions. Word has length 133 [2021-11-07 08:16:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:38,506 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1178 transitions. [2021-11-07 08:16:38,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-11-07 08:16:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1178 transitions. [2021-11-07 08:16:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 08:16:38,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:38,508 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-11-07 08:16:38,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-07 08:16:38,508 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:38,508 INFO L85 PathProgramCache]: Analyzing trace with hash -227521597, now seen corresponding path program 1 times [2021-11-07 08:16:38,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:38,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405992065] [2021-11-07 08:16:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:38,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:38,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:38,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405992065] [2021-11-07 08:16:38,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405992065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:38,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:38,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:38,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236832567] [2021-11-07 08:16:38,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:38,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:38,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:38,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:38,571 INFO L87 Difference]: Start difference. First operand 777 states and 1178 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:39,834 INFO L93 Difference]: Finished difference Result 1733 states and 2634 transitions. [2021-11-07 08:16:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 134 [2021-11-07 08:16:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:39,840 INFO L225 Difference]: With dead ends: 1733 [2021-11-07 08:16:39,841 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 08:16:39,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 08:16:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 801. [2021-11-07 08:16:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.515) internal successors, (1212), 800 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1212 transitions. [2021-11-07 08:16:39,874 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1212 transitions. Word has length 134 [2021-11-07 08:16:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:39,874 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1212 transitions. [2021-11-07 08:16:39,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1212 transitions. [2021-11-07 08:16:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 08:16:39,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:39,876 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-07 08:16:39,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-07 08:16:39,877 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 364594307, now seen corresponding path program 1 times [2021-11-07 08:16:39,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:39,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201230253] [2021-11-07 08:16:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:39,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-07 08:16:39,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:39,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201230253] [2021-11-07 08:16:39,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201230253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:39,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:39,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:39,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685536790] [2021-11-07 08:16:39,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:39,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:39,942 INFO L87 Difference]: Start difference. First operand 801 states and 1212 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:40,862 INFO L93 Difference]: Finished difference Result 1609 states and 2436 transitions. [2021-11-07 08:16:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 134 [2021-11-07 08:16:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:40,869 INFO L225 Difference]: With dead ends: 1609 [2021-11-07 08:16:40,869 INFO L226 Difference]: Without dead ends: 831 [2021-11-07 08:16:40,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-07 08:16:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 801. [2021-11-07 08:16:40,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.5125) internal successors, (1210), 800 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1210 transitions. [2021-11-07 08:16:40,893 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1210 transitions. Word has length 134 [2021-11-07 08:16:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:40,893 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1210 transitions. [2021-11-07 08:16:40,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1210 transitions. [2021-11-07 08:16:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 08:16:40,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:40,895 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-11-07 08:16:40,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-07 08:16:40,895 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1602114191, now seen corresponding path program 1 times [2021-11-07 08:16:40,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:40,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699661562] [2021-11-07 08:16:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:40,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:40,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:40,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699661562] [2021-11-07 08:16:40,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699661562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:40,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:40,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:40,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695877332] [2021-11-07 08:16:40,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:40,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:40,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:40,969 INFO L87 Difference]: Start difference. First operand 801 states and 1210 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:42,234 INFO L93 Difference]: Finished difference Result 1757 states and 2662 transitions. [2021-11-07 08:16:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-07 08:16:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:42,239 INFO L225 Difference]: With dead ends: 1757 [2021-11-07 08:16:42,240 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 08:16:42,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 08:16:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 803. [2021-11-07 08:16:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.5112219451371571) internal successors, (1212), 802 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1212 transitions. [2021-11-07 08:16:42,271 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1212 transitions. Word has length 135 [2021-11-07 08:16:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:42,271 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1212 transitions. [2021-11-07 08:16:42,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1212 transitions. [2021-11-07 08:16:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 08:16:42,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:42,273 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-11-07 08:16:42,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-07 08:16:42,274 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash -543955832, now seen corresponding path program 1 times [2021-11-07 08:16:42,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:42,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764771962] [2021-11-07 08:16:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:42,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:42,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:42,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764771962] [2021-11-07 08:16:42,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764771962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:42,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:42,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:42,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892651865] [2021-11-07 08:16:42,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:42,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:42,339 INFO L87 Difference]: Start difference. First operand 803 states and 1212 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:43,285 INFO L93 Difference]: Finished difference Result 1759 states and 2662 transitions. [2021-11-07 08:16:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-07 08:16:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:43,288 INFO L225 Difference]: With dead ends: 1759 [2021-11-07 08:16:43,289 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 08:16:43,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 08:16:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 805. [2021-11-07 08:16:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 1.5099502487562189) internal successors, (1214), 804 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1214 transitions. [2021-11-07 08:16:43,315 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1214 transitions. Word has length 136 [2021-11-07 08:16:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:43,315 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1214 transitions. [2021-11-07 08:16:43,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1214 transitions. [2021-11-07 08:16:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 08:16:43,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:43,318 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-11-07 08:16:43,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-07 08:16:43,318 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1382854412, now seen corresponding path program 1 times [2021-11-07 08:16:43,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:43,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288933962] [2021-11-07 08:16:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:43,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:43,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:43,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288933962] [2021-11-07 08:16:43,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288933962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:43,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:43,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:43,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950185509] [2021-11-07 08:16:43,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:43,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:43,382 INFO L87 Difference]: Start difference. First operand 805 states and 1214 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:44,694 INFO L93 Difference]: Finished difference Result 1741 states and 2638 transitions. [2021-11-07 08:16:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-07 08:16:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:44,696 INFO L225 Difference]: With dead ends: 1741 [2021-11-07 08:16:44,696 INFO L226 Difference]: Without dead ends: 959 [2021-11-07 08:16:44,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-07 08:16:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 807. [2021-11-07 08:16:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.5086848635235732) internal successors, (1216), 806 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1216 transitions. [2021-11-07 08:16:44,726 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1216 transitions. Word has length 137 [2021-11-07 08:16:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:44,726 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1216 transitions. [2021-11-07 08:16:44,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1216 transitions. [2021-11-07 08:16:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 08:16:44,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:44,729 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:44,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-07 08:16:44,730 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:44,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1216020057, now seen corresponding path program 1 times [2021-11-07 08:16:44,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:44,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912069147] [2021-11-07 08:16:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:44,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:44,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:44,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912069147] [2021-11-07 08:16:44,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912069147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:44,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:44,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:44,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632249234] [2021-11-07 08:16:44,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:44,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:44,832 INFO L87 Difference]: Start difference. First operand 807 states and 1216 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:45,820 INFO L93 Difference]: Finished difference Result 1763 states and 2662 transitions. [2021-11-07 08:16:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:45,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-07 08:16:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:45,824 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 08:16:45,824 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 08:16:45,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 08:16:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 807. [2021-11-07 08:16:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.5062034739454093) internal successors, (1214), 806 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1214 transitions. [2021-11-07 08:16:45,866 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1214 transitions. Word has length 140 [2021-11-07 08:16:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:45,866 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1214 transitions. [2021-11-07 08:16:45,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1214 transitions. [2021-11-07 08:16:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 08:16:45,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:45,870 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:45,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-07 08:16:45,870 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash -892734791, now seen corresponding path program 1 times [2021-11-07 08:16:45,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:45,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763293146] [2021-11-07 08:16:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:45,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:45,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:45,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763293146] [2021-11-07 08:16:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763293146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:45,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:45,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:45,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534392977] [2021-11-07 08:16:45,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:45,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:45,960 INFO L87 Difference]: Start difference. First operand 807 states and 1214 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:47,022 INFO L93 Difference]: Finished difference Result 1763 states and 2658 transitions. [2021-11-07 08:16:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 08:16:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:47,024 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 08:16:47,024 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 08:16:47,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 08:16:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 807. [2021-11-07 08:16:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.5037220843672456) internal successors, (1212), 806 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1212 transitions. [2021-11-07 08:16:47,047 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1212 transitions. Word has length 141 [2021-11-07 08:16:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:47,047 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1212 transitions. [2021-11-07 08:16:47,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1212 transitions. [2021-11-07 08:16:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 08:16:47,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:47,049 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:47,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-07 08:16:47,049 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -574862946, now seen corresponding path program 1 times [2021-11-07 08:16:47,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:47,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95989628] [2021-11-07 08:16:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:47,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:47,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:47,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95989628] [2021-11-07 08:16:47,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95989628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:47,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:47,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:47,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327435643] [2021-11-07 08:16:47,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:47,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:47,114 INFO L87 Difference]: Start difference. First operand 807 states and 1212 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:48,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:48,883 INFO L93 Difference]: Finished difference Result 1763 states and 2654 transitions. [2021-11-07 08:16:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:48,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-07 08:16:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:48,885 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 08:16:48,885 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 08:16:48,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 08:16:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 807. [2021-11-07 08:16:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.501240694789082) internal successors, (1210), 806 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1210 transitions. [2021-11-07 08:16:48,926 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1210 transitions. Word has length 142 [2021-11-07 08:16:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:48,926 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1210 transitions. [2021-11-07 08:16:48,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1210 transitions. [2021-11-07 08:16:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 08:16:48,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:48,928 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:48,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-07 08:16:48,928 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1953992350, now seen corresponding path program 1 times [2021-11-07 08:16:48,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:48,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078089243] [2021-11-07 08:16:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:48,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:16:48,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:48,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078089243] [2021-11-07 08:16:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078089243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:48,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:48,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:48,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727369634] [2021-11-07 08:16:48,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:48,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:48,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:48,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:48,998 INFO L87 Difference]: Start difference. First operand 807 states and 1210 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:51,385 INFO L93 Difference]: Finished difference Result 1743 states and 2626 transitions. [2021-11-07 08:16:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 08:16:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:51,389 INFO L225 Difference]: With dead ends: 1743 [2021-11-07 08:16:51,389 INFO L226 Difference]: Without dead ends: 959 [2021-11-07 08:16:51,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-07 08:16:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 777. [2021-11-07 08:16:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.5051546391752577) internal successors, (1168), 776 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1168 transitions. [2021-11-07 08:16:51,415 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1168 transitions. Word has length 143 [2021-11-07 08:16:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:51,416 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1168 transitions. [2021-11-07 08:16:51,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1168 transitions. [2021-11-07 08:16:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 08:16:51,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:51,418 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:51,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-07 08:16:51,419 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash 547062178, now seen corresponding path program 1 times [2021-11-07 08:16:51,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:51,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287568533] [2021-11-07 08:16:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:51,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:51,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:51,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287568533] [2021-11-07 08:16:51,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287568533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:51,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:51,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:51,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59963075] [2021-11-07 08:16:51,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:51,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:51,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:51,494 INFO L87 Difference]: Start difference. First operand 777 states and 1168 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:52,342 INFO L93 Difference]: Finished difference Result 1713 states and 2582 transitions. [2021-11-07 08:16:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 08:16:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:52,343 INFO L225 Difference]: With dead ends: 1713 [2021-11-07 08:16:52,344 INFO L226 Difference]: Without dead ends: 959 [2021-11-07 08:16:52,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-07 08:16:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 833. [2021-11-07 08:16:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 1.5120192307692308) internal successors, (1258), 832 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1258 transitions. [2021-11-07 08:16:52,378 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1258 transitions. Word has length 144 [2021-11-07 08:16:52,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:52,378 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1258 transitions. [2021-11-07 08:16:52,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1258 transitions. [2021-11-07 08:16:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 08:16:52,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:52,380 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:52,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-07 08:16:52,380 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1522605678, now seen corresponding path program 1 times [2021-11-07 08:16:52,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:52,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590946233] [2021-11-07 08:16:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:52,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:52,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:52,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590946233] [2021-11-07 08:16:52,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590946233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:52,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:52,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:52,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253289995] [2021-11-07 08:16:52,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:52,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:52,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:52,446 INFO L87 Difference]: Start difference. First operand 833 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:53,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:53,628 INFO L93 Difference]: Finished difference Result 1753 states and 2644 transitions. [2021-11-07 08:16:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:53,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 145 [2021-11-07 08:16:53,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:53,634 INFO L225 Difference]: With dead ends: 1753 [2021-11-07 08:16:53,634 INFO L226 Difference]: Without dead ends: 943 [2021-11-07 08:16:53,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-07 08:16:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 835. [2021-11-07 08:16:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.5107913669064748) internal successors, (1260), 834 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1260 transitions. [2021-11-07 08:16:53,663 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1260 transitions. Word has length 145 [2021-11-07 08:16:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1260 transitions. [2021-11-07 08:16:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1260 transitions. [2021-11-07 08:16:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 08:16:53,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:53,666 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 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] [2021-11-07 08:16:53,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-07 08:16:53,667 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:53,667 INFO L85 PathProgramCache]: Analyzing trace with hash 151311284, now seen corresponding path program 1 times [2021-11-07 08:16:53,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:53,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992032494] [2021-11-07 08:16:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:53,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-07 08:16:53,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:53,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992032494] [2021-11-07 08:16:53,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992032494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:53,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:53,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:53,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540558971] [2021-11-07 08:16:53,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:53,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:53,746 INFO L87 Difference]: Start difference. First operand 835 states and 1260 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:56,068 INFO L93 Difference]: Finished difference Result 1755 states and 2644 transitions. [2021-11-07 08:16:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-07 08:16:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:56,070 INFO L225 Difference]: With dead ends: 1755 [2021-11-07 08:16:56,070 INFO L226 Difference]: Without dead ends: 943 [2021-11-07 08:16:56,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-07 08:16:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 835. [2021-11-07 08:16:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.5083932853717026) internal successors, (1258), 834 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1258 transitions. [2021-11-07 08:16:56,108 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1258 transitions. Word has length 147 [2021-11-07 08:16:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:56,108 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1258 transitions. [2021-11-07 08:16:56,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1258 transitions. [2021-11-07 08:16:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 08:16:56,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:56,110 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:56,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-07 08:16:56,110 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1940470748, now seen corresponding path program 1 times [2021-11-07 08:16:56,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:56,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292837327] [2021-11-07 08:16:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:56,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:16:56,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:56,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292837327] [2021-11-07 08:16:56,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292837327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:56,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:56,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:56,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731277441] [2021-11-07 08:16:56,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:56,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:56,178 INFO L87 Difference]: Start difference. First operand 835 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:57,131 INFO L93 Difference]: Finished difference Result 1749 states and 2632 transitions. [2021-11-07 08:16:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 148 [2021-11-07 08:16:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:57,133 INFO L225 Difference]: With dead ends: 1749 [2021-11-07 08:16:57,133 INFO L226 Difference]: Without dead ends: 937 [2021-11-07 08:16:57,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-07 08:16:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 841. [2021-11-07 08:16:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5095238095238095) internal successors, (1268), 840 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1268 transitions. [2021-11-07 08:16:57,162 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1268 transitions. Word has length 148 [2021-11-07 08:16:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:57,162 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1268 transitions. [2021-11-07 08:16:57,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1268 transitions. [2021-11-07 08:16:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 08:16:57,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:57,165 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 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] [2021-11-07 08:16:57,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-07 08:16:57,165 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash -934316248, now seen corresponding path program 1 times [2021-11-07 08:16:57,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:57,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501856737] [2021-11-07 08:16:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:57,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-07 08:16:57,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:57,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501856737] [2021-11-07 08:16:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501856737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:57,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:57,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:57,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40764600] [2021-11-07 08:16:57,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:57,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:57,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:57,247 INFO L87 Difference]: Start difference. First operand 841 states and 1268 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:58,760 INFO L93 Difference]: Finished difference Result 1751 states and 2636 transitions. [2021-11-07 08:16:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:16:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 148 [2021-11-07 08:16:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:58,763 INFO L225 Difference]: With dead ends: 1751 [2021-11-07 08:16:58,763 INFO L226 Difference]: Without dead ends: 933 [2021-11-07 08:16:58,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:16:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-07 08:16:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 841. [2021-11-07 08:16:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5071428571428571) internal successors, (1266), 840 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1266 transitions. [2021-11-07 08:16:58,797 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1266 transitions. Word has length 148 [2021-11-07 08:16:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:58,797 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1266 transitions. [2021-11-07 08:16:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1266 transitions. [2021-11-07 08:16:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 08:16:58,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:58,800 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-07 08:16:58,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-07 08:16:58,800 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1179536171, now seen corresponding path program 1 times [2021-11-07 08:16:58,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:58,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214106091] [2021-11-07 08:16:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:58,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 08:16:58,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:58,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214106091] [2021-11-07 08:16:58,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214106091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:58,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:58,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:16:58,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347128412] [2021-11-07 08:16:58,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:16:58,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:16:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:16:58,869 INFO L87 Difference]: Start difference. First operand 841 states and 1266 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:00,303 INFO L93 Difference]: Finished difference Result 1729 states and 2598 transitions. [2021-11-07 08:17:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 148 [2021-11-07 08:17:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:00,305 INFO L225 Difference]: With dead ends: 1729 [2021-11-07 08:17:00,305 INFO L226 Difference]: Without dead ends: 911 [2021-11-07 08:17:00,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-07 08:17:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 841. [2021-11-07 08:17:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5047619047619047) internal successors, (1264), 840 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1264 transitions. [2021-11-07 08:17:00,327 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1264 transitions. Word has length 148 [2021-11-07 08:17:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:00,327 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1264 transitions. [2021-11-07 08:17:00,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1264 transitions. [2021-11-07 08:17:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 08:17:00,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:00,329 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-07 08:17:00,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-07 08:17:00,329 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2140533827, now seen corresponding path program 1 times [2021-11-07 08:17:00,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:00,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49141519] [2021-11-07 08:17:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:00,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 08:17:00,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:00,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49141519] [2021-11-07 08:17:00,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49141519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:00,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:00,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:00,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535590938] [2021-11-07 08:17:00,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:00,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:00,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:00,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:00,397 INFO L87 Difference]: Start difference. First operand 841 states and 1264 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:01,639 INFO L93 Difference]: Finished difference Result 1729 states and 2594 transitions. [2021-11-07 08:17:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 08:17:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:01,642 INFO L225 Difference]: With dead ends: 1729 [2021-11-07 08:17:01,642 INFO L226 Difference]: Without dead ends: 911 [2021-11-07 08:17:01,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-07 08:17:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 841. [2021-11-07 08:17:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5023809523809524) internal successors, (1262), 840 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1262 transitions. [2021-11-07 08:17:01,698 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1262 transitions. Word has length 149 [2021-11-07 08:17:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:01,699 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1262 transitions. [2021-11-07 08:17:01,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1262 transitions. [2021-11-07 08:17:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 08:17:01,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:01,701 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:01,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-07 08:17:01,702 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash 879784120, now seen corresponding path program 1 times [2021-11-07 08:17:01,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:01,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524596382] [2021-11-07 08:17:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:01,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:01,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:01,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524596382] [2021-11-07 08:17:01,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524596382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:01,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:01,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:01,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169884815] [2021-11-07 08:17:01,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:01,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:01,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:01,770 INFO L87 Difference]: Start difference. First operand 841 states and 1262 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:02,638 INFO L93 Difference]: Finished difference Result 1777 states and 2662 transitions. [2021-11-07 08:17:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-07 08:17:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:02,640 INFO L225 Difference]: With dead ends: 1777 [2021-11-07 08:17:02,640 INFO L226 Difference]: Without dead ends: 959 [2021-11-07 08:17:02,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-07 08:17:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 841. [2021-11-07 08:17:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5) internal successors, (1260), 840 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1260 transitions. [2021-11-07 08:17:02,665 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1260 transitions. Word has length 150 [2021-11-07 08:17:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:02,666 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1260 transitions. [2021-11-07 08:17:02,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1260 transitions. [2021-11-07 08:17:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 08:17:02,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:02,667 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-07 08:17:02,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-07 08:17:02,668 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:02,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash -601927398, now seen corresponding path program 1 times [2021-11-07 08:17:02,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:02,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932100439] [2021-11-07 08:17:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:02,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 08:17:02,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:02,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932100439] [2021-11-07 08:17:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932100439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:02,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:02,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:02,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041407839] [2021-11-07 08:17:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:02,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:02,747 INFO L87 Difference]: Start difference. First operand 841 states and 1260 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:05,069 INFO L93 Difference]: Finished difference Result 1729 states and 2586 transitions. [2021-11-07 08:17:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:05,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-07 08:17:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:05,070 INFO L225 Difference]: With dead ends: 1729 [2021-11-07 08:17:05,070 INFO L226 Difference]: Without dead ends: 911 [2021-11-07 08:17:05,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-07 08:17:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 841. [2021-11-07 08:17:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.4976190476190476) internal successors, (1258), 840 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1258 transitions. [2021-11-07 08:17:05,095 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1258 transitions. Word has length 150 [2021-11-07 08:17:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:05,095 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1258 transitions. [2021-11-07 08:17:05,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1258 transitions. [2021-11-07 08:17:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 08:17:05,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:05,097 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:05,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-07 08:17:05,097 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1047916008, now seen corresponding path program 1 times [2021-11-07 08:17:05,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:05,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793030650] [2021-11-07 08:17:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:05,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:05,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:05,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793030650] [2021-11-07 08:17:05,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793030650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:05,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:05,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:05,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704477639] [2021-11-07 08:17:05,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:05,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:05,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:05,163 INFO L87 Difference]: Start difference. First operand 841 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:05,776 INFO L93 Difference]: Finished difference Result 1761 states and 2628 transitions. [2021-11-07 08:17:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-07 08:17:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:05,778 INFO L225 Difference]: With dead ends: 1761 [2021-11-07 08:17:05,778 INFO L226 Difference]: Without dead ends: 943 [2021-11-07 08:17:05,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-07 08:17:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 841. [2021-11-07 08:17:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.4952380952380953) internal successors, (1256), 840 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1256 transitions. [2021-11-07 08:17:05,819 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1256 transitions. Word has length 151 [2021-11-07 08:17:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:05,819 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1256 transitions. [2021-11-07 08:17:05,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1256 transitions. [2021-11-07 08:17:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 08:17:05,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:05,822 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:05,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-11-07 08:17:05,822 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash 754378966, now seen corresponding path program 1 times [2021-11-07 08:17:05,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:05,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478765972] [2021-11-07 08:17:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:05,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:05,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:05,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478765972] [2021-11-07 08:17:05,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478765972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:05,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:05,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:05,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121819975] [2021-11-07 08:17:05,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:05,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:05,884 INFO L87 Difference]: Start difference. First operand 841 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:07,049 INFO L93 Difference]: Finished difference Result 1751 states and 2612 transitions. [2021-11-07 08:17:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-07 08:17:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:07,050 INFO L225 Difference]: With dead ends: 1751 [2021-11-07 08:17:07,050 INFO L226 Difference]: Without dead ends: 933 [2021-11-07 08:17:07,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-07 08:17:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 843. [2021-11-07 08:17:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 1.494061757719715) internal successors, (1258), 842 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1258 transitions. [2021-11-07 08:17:07,075 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1258 transitions. Word has length 151 [2021-11-07 08:17:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:07,076 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1258 transitions. [2021-11-07 08:17:07,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1258 transitions. [2021-11-07 08:17:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 08:17:07,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:07,077 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-07 08:17:07,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-11-07 08:17:07,077 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1114994338, now seen corresponding path program 1 times [2021-11-07 08:17:07,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:07,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885386651] [2021-11-07 08:17:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:07,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 08:17:07,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:07,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885386651] [2021-11-07 08:17:07,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885386651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:07,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:07,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:07,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106970331] [2021-11-07 08:17:07,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:07,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:07,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:07,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:07,139 INFO L87 Difference]: Start difference. First operand 843 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:09,421 INFO L93 Difference]: Finished difference Result 1713 states and 2558 transitions. [2021-11-07 08:17:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 151 [2021-11-07 08:17:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:09,423 INFO L225 Difference]: With dead ends: 1713 [2021-11-07 08:17:09,423 INFO L226 Difference]: Without dead ends: 893 [2021-11-07 08:17:09,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-07 08:17:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 843. [2021-11-07 08:17:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 1.491686460807601) internal successors, (1256), 842 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1256 transitions. [2021-11-07 08:17:09,459 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1256 transitions. Word has length 151 [2021-11-07 08:17:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:09,459 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1256 transitions. [2021-11-07 08:17:09,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1256 transitions. [2021-11-07 08:17:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 08:17:09,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:09,461 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:09,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-11-07 08:17:09,461 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1723537167, now seen corresponding path program 1 times [2021-11-07 08:17:09,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:09,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026190517] [2021-11-07 08:17:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:09,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:09,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:09,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026190517] [2021-11-07 08:17:09,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026190517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:09,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:09,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:09,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388744106] [2021-11-07 08:17:09,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:09,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:09,513 INFO L87 Difference]: Start difference. First operand 843 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:10,185 INFO L93 Difference]: Finished difference Result 1741 states and 2592 transitions. [2021-11-07 08:17:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-07 08:17:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:10,187 INFO L225 Difference]: With dead ends: 1741 [2021-11-07 08:17:10,187 INFO L226 Difference]: Without dead ends: 921 [2021-11-07 08:17:10,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-07 08:17:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 845. [2021-11-07 08:17:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.490521327014218) internal successors, (1258), 844 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1258 transitions. [2021-11-07 08:17:10,229 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1258 transitions. Word has length 152 [2021-11-07 08:17:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:10,229 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1258 transitions. [2021-11-07 08:17:10,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1258 transitions. [2021-11-07 08:17:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 08:17:10,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:10,231 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:10,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-11-07 08:17:10,232 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash -614844143, now seen corresponding path program 1 times [2021-11-07 08:17:10,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:10,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066384389] [2021-11-07 08:17:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:10,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:10,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:10,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066384389] [2021-11-07 08:17:10,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066384389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:10,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:10,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:10,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469090831] [2021-11-07 08:17:10,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:10,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:10,307 INFO L87 Difference]: Start difference. First operand 845 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:11,227 INFO L93 Difference]: Finished difference Result 1743 states and 2592 transitions. [2021-11-07 08:17:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-07 08:17:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:11,230 INFO L225 Difference]: With dead ends: 1743 [2021-11-07 08:17:11,230 INFO L226 Difference]: Without dead ends: 921 [2021-11-07 08:17:11,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-07 08:17:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 847. [2021-11-07 08:17:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.4893617021276595) internal successors, (1260), 846 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1260 transitions. [2021-11-07 08:17:11,273 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1260 transitions. Word has length 152 [2021-11-07 08:17:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:11,274 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1260 transitions. [2021-11-07 08:17:11,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1260 transitions. [2021-11-07 08:17:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 08:17:11,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:11,276 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:11,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-11-07 08:17:11,276 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:11,277 INFO L85 PathProgramCache]: Analyzing trace with hash -513833762, now seen corresponding path program 1 times [2021-11-07 08:17:11,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:11,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426945598] [2021-11-07 08:17:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:11,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-07 08:17:11,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:11,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426945598] [2021-11-07 08:17:11,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426945598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:11,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:11,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:11,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125056692] [2021-11-07 08:17:11,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:11,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:11,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:11,348 INFO L87 Difference]: Start difference. First operand 847 states and 1260 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:12,083 INFO L93 Difference]: Finished difference Result 1767 states and 2620 transitions. [2021-11-07 08:17:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-07 08:17:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:12,085 INFO L225 Difference]: With dead ends: 1767 [2021-11-07 08:17:12,085 INFO L226 Difference]: Without dead ends: 943 [2021-11-07 08:17:12,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-07 08:17:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 847. [2021-11-07 08:17:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.4869976359338062) internal successors, (1258), 846 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1258 transitions. [2021-11-07 08:17:12,111 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1258 transitions. Word has length 153 [2021-11-07 08:17:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:12,112 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1258 transitions. [2021-11-07 08:17:12,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1258 transitions. [2021-11-07 08:17:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 08:17:12,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:12,113 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:12,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-11-07 08:17:12,116 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2036139352, now seen corresponding path program 1 times [2021-11-07 08:17:12,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:12,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187247193] [2021-11-07 08:17:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:12,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:12,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:12,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187247193] [2021-11-07 08:17:12,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187247193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:12,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:12,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:12,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910688170] [2021-11-07 08:17:12,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:12,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:12,170 INFO L87 Difference]: Start difference. First operand 847 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:14,498 INFO L93 Difference]: Finished difference Result 1739 states and 2581 transitions. [2021-11-07 08:17:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:14,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 153 [2021-11-07 08:17:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:14,500 INFO L225 Difference]: With dead ends: 1739 [2021-11-07 08:17:14,500 INFO L226 Difference]: Without dead ends: 915 [2021-11-07 08:17:14,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-07 08:17:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 849. [2021-11-07 08:17:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.4858490566037736) internal successors, (1260), 848 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1260 transitions. [2021-11-07 08:17:14,546 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1260 transitions. Word has length 153 [2021-11-07 08:17:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:14,547 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1260 transitions. [2021-11-07 08:17:14,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1260 transitions. [2021-11-07 08:17:14,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 08:17:14,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:14,549 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:14,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-11-07 08:17:14,550 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1085130694, now seen corresponding path program 1 times [2021-11-07 08:17:14,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:14,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741819300] [2021-11-07 08:17:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:14,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:14,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:14,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741819300] [2021-11-07 08:17:14,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741819300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:14,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:14,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:14,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954447042] [2021-11-07 08:17:14,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:14,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:14,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:14,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:14,616 INFO L87 Difference]: Start difference. First operand 849 states and 1260 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:16,196 INFO L93 Difference]: Finished difference Result 1763 states and 2608 transitions. [2021-11-07 08:17:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 154 [2021-11-07 08:17:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:16,198 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 08:17:16,199 INFO L226 Difference]: Without dead ends: 937 [2021-11-07 08:17:16,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-07 08:17:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 849. [2021-11-07 08:17:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.4834905660377358) internal successors, (1258), 848 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1258 transitions. [2021-11-07 08:17:16,251 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1258 transitions. Word has length 154 [2021-11-07 08:17:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:16,251 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1258 transitions. [2021-11-07 08:17:16,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1258 transitions. [2021-11-07 08:17:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 08:17:16,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:16,253 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:16,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-07 08:17:16,254 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash -78976194, now seen corresponding path program 1 times [2021-11-07 08:17:16,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:16,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716601336] [2021-11-07 08:17:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:16,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-07 08:17:16,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:16,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716601336] [2021-11-07 08:17:16,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716601336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:16,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:16,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:16,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409166559] [2021-11-07 08:17:16,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:16,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:16,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:16,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:16,318 INFO L87 Difference]: Start difference. First operand 849 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:17,055 INFO L93 Difference]: Finished difference Result 1759 states and 2600 transitions. [2021-11-07 08:17:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-07 08:17:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:17,057 INFO L225 Difference]: With dead ends: 1759 [2021-11-07 08:17:17,057 INFO L226 Difference]: Without dead ends: 933 [2021-11-07 08:17:17,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-07 08:17:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 849. [2021-11-07 08:17:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.4811320754716981) internal successors, (1256), 848 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1256 transitions. [2021-11-07 08:17:17,088 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1256 transitions. Word has length 154 [2021-11-07 08:17:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:17,088 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1256 transitions. [2021-11-07 08:17:17,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1256 transitions. [2021-11-07 08:17:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 08:17:17,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:17,090 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:17,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-11-07 08:17:17,090 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2040413127, now seen corresponding path program 1 times [2021-11-07 08:17:17,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:17,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151885532] [2021-11-07 08:17:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:17,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:17,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:17,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151885532] [2021-11-07 08:17:17,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151885532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:17,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:17,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:17,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029911437] [2021-11-07 08:17:17,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:17,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:17,147 INFO L87 Difference]: Start difference. First operand 849 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:19,466 INFO L93 Difference]: Finished difference Result 1741 states and 2573 transitions. [2021-11-07 08:17:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-07 08:17:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:19,467 INFO L225 Difference]: With dead ends: 1741 [2021-11-07 08:17:19,467 INFO L226 Difference]: Without dead ends: 915 [2021-11-07 08:17:19,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-07 08:17:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 851. [2021-11-07 08:17:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.48) internal successors, (1258), 850 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1258 transitions. [2021-11-07 08:17:19,497 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1258 transitions. Word has length 154 [2021-11-07 08:17:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:19,497 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1258 transitions. [2021-11-07 08:17:19,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1258 transitions. [2021-11-07 08:17:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 08:17:19,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:19,499 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:19,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-11-07 08:17:19,499 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1310969376, now seen corresponding path program 1 times [2021-11-07 08:17:19,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:19,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311274601] [2021-11-07 08:17:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:19,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:19,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:19,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311274601] [2021-11-07 08:17:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311274601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:19,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:19,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:19,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157642721] [2021-11-07 08:17:19,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:19,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:19,553 INFO L87 Difference]: Start difference. First operand 851 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:20,325 INFO L93 Difference]: Finished difference Result 1737 states and 2566 transitions. [2021-11-07 08:17:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-07 08:17:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:20,326 INFO L225 Difference]: With dead ends: 1737 [2021-11-07 08:17:20,327 INFO L226 Difference]: Without dead ends: 909 [2021-11-07 08:17:20,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-11-07 08:17:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 853. [2021-11-07 08:17:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4788732394366197) internal successors, (1260), 852 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1260 transitions. [2021-11-07 08:17:20,377 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1260 transitions. Word has length 155 [2021-11-07 08:17:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:20,377 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1260 transitions. [2021-11-07 08:17:20,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1260 transitions. [2021-11-07 08:17:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 08:17:20,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:20,380 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:20,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-11-07 08:17:20,381 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:20,381 INFO L85 PathProgramCache]: Analyzing trace with hash 148960512, now seen corresponding path program 1 times [2021-11-07 08:17:20,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:20,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022661452] [2021-11-07 08:17:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:20,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:20,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:20,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022661452] [2021-11-07 08:17:20,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022661452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:20,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:20,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:20,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314586338] [2021-11-07 08:17:20,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:20,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:20,446 INFO L87 Difference]: Start difference. First operand 853 states and 1260 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:21,377 INFO L93 Difference]: Finished difference Result 1763 states and 2596 transitions. [2021-11-07 08:17:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-07 08:17:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:21,379 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 08:17:21,379 INFO L226 Difference]: Without dead ends: 933 [2021-11-07 08:17:21,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-07 08:17:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 853. [2021-11-07 08:17:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4765258215962442) internal successors, (1258), 852 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1258 transitions. [2021-11-07 08:17:21,408 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1258 transitions. Word has length 157 [2021-11-07 08:17:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:21,408 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1258 transitions. [2021-11-07 08:17:21,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1258 transitions. [2021-11-07 08:17:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 08:17:21,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:21,410 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:21,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-11-07 08:17:21,410 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash 135434277, now seen corresponding path program 1 times [2021-11-07 08:17:21,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:21,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342225252] [2021-11-07 08:17:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:21,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:21,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:21,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342225252] [2021-11-07 08:17:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342225252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:21,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:21,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:21,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180478861] [2021-11-07 08:17:21,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:21,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:21,467 INFO L87 Difference]: Start difference. First operand 853 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:22,970 INFO L93 Difference]: Finished difference Result 1751 states and 2576 transitions. [2021-11-07 08:17:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-07 08:17:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:22,971 INFO L225 Difference]: With dead ends: 1751 [2021-11-07 08:17:22,971 INFO L226 Difference]: Without dead ends: 921 [2021-11-07 08:17:22,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-07 08:17:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 853. [2021-11-07 08:17:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4741784037558685) internal successors, (1256), 852 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1256 transitions. [2021-11-07 08:17:23,007 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1256 transitions. Word has length 158 [2021-11-07 08:17:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1256 transitions. [2021-11-07 08:17:23,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1256 transitions. [2021-11-07 08:17:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 08:17:23,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:23,010 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:23,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-11-07 08:17:23,011 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2092020263, now seen corresponding path program 1 times [2021-11-07 08:17:23,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:23,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037432769] [2021-11-07 08:17:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:23,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:23,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:23,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037432769] [2021-11-07 08:17:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037432769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:23,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:23,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:23,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106961540] [2021-11-07 08:17:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:23,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:23,072 INFO L87 Difference]: Start difference. First operand 853 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:23,921 INFO L93 Difference]: Finished difference Result 1751 states and 2572 transitions. [2021-11-07 08:17:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:23,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-07 08:17:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:23,923 INFO L225 Difference]: With dead ends: 1751 [2021-11-07 08:17:23,923 INFO L226 Difference]: Without dead ends: 921 [2021-11-07 08:17:23,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-07 08:17:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 853. [2021-11-07 08:17:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.471830985915493) internal successors, (1254), 852 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1254 transitions. [2021-11-07 08:17:23,963 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1254 transitions. Word has length 158 [2021-11-07 08:17:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:23,963 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1254 transitions. [2021-11-07 08:17:23,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1254 transitions. [2021-11-07 08:17:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 08:17:23,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:23,965 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:17:23,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-11-07 08:17:23,965 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:23,966 INFO L85 PathProgramCache]: Analyzing trace with hash -805159884, now seen corresponding path program 1 times [2021-11-07 08:17:23,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:23,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832340903] [2021-11-07 08:17:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:23,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-07 08:17:24,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:24,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832340903] [2021-11-07 08:17:24,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832340903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:24,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:24,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:24,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111101104] [2021-11-07 08:17:24,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:24,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:24,024 INFO L87 Difference]: Start difference. First operand 853 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:24,856 INFO L93 Difference]: Finished difference Result 1817 states and 2686 transitions. [2021-11-07 08:17:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-07 08:17:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:24,858 INFO L225 Difference]: With dead ends: 1817 [2021-11-07 08:17:24,858 INFO L226 Difference]: Without dead ends: 987 [2021-11-07 08:17:24,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-11-07 08:17:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 913. [2021-11-07 08:17:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.4912280701754386) internal successors, (1360), 912 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1360 transitions. [2021-11-07 08:17:24,938 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1360 transitions. Word has length 158 [2021-11-07 08:17:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:24,938 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1360 transitions. [2021-11-07 08:17:24,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1360 transitions. [2021-11-07 08:17:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 08:17:24,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:24,941 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:17:24,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-11-07 08:17:24,941 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:24,941 INFO L85 PathProgramCache]: Analyzing trace with hash 49590018, now seen corresponding path program 1 times [2021-11-07 08:17:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:24,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283057657] [2021-11-07 08:17:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:24,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:25,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:25,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283057657] [2021-11-07 08:17:25,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283057657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:25,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:25,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:25,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753788302] [2021-11-07 08:17:25,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:25,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:25,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:25,023 INFO L87 Difference]: Start difference. First operand 913 states and 1360 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:26,030 INFO L93 Difference]: Finished difference Result 1865 states and 2773 transitions. [2021-11-07 08:17:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 159 [2021-11-07 08:17:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:26,032 INFO L225 Difference]: With dead ends: 1865 [2021-11-07 08:17:26,032 INFO L226 Difference]: Without dead ends: 975 [2021-11-07 08:17:26,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-07 08:17:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 913. [2021-11-07 08:17:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.4890350877192982) internal successors, (1358), 912 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1358 transitions. [2021-11-07 08:17:26,069 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1358 transitions. Word has length 159 [2021-11-07 08:17:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:26,069 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1358 transitions. [2021-11-07 08:17:26,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1358 transitions. [2021-11-07 08:17:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 08:17:26,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:26,070 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:17:26,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-11-07 08:17:26,071 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash 801066959, now seen corresponding path program 1 times [2021-11-07 08:17:26,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:26,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423467031] [2021-11-07 08:17:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:26,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:26,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:26,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423467031] [2021-11-07 08:17:26,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423467031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:26,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:26,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936324054] [2021-11-07 08:17:26,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:26,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:26,130 INFO L87 Difference]: Start difference. First operand 913 states and 1358 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:27,100 INFO L93 Difference]: Finished difference Result 1865 states and 2769 transitions. [2021-11-07 08:17:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 160 [2021-11-07 08:17:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:27,101 INFO L225 Difference]: With dead ends: 1865 [2021-11-07 08:17:27,101 INFO L226 Difference]: Without dead ends: 975 [2021-11-07 08:17:27,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-07 08:17:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 913. [2021-11-07 08:17:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.486842105263158) internal successors, (1356), 912 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1356 transitions. [2021-11-07 08:17:27,137 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1356 transitions. Word has length 160 [2021-11-07 08:17:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:27,137 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1356 transitions. [2021-11-07 08:17:27,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1356 transitions. [2021-11-07 08:17:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 08:17:27,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:27,138 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:17:27,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-11-07 08:17:27,139 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash -797461174, now seen corresponding path program 1 times [2021-11-07 08:17:27,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:27,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109553905] [2021-11-07 08:17:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:27,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 08:17:27,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:27,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109553905] [2021-11-07 08:17:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109553905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:27,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:27,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:27,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903103879] [2021-11-07 08:17:27,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:27,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:27,208 INFO L87 Difference]: Start difference. First operand 913 states and 1356 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:27,975 INFO L93 Difference]: Finished difference Result 1859 states and 2758 transitions. [2021-11-07 08:17:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-07 08:17:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:27,976 INFO L225 Difference]: With dead ends: 1859 [2021-11-07 08:17:27,977 INFO L226 Difference]: Without dead ends: 969 [2021-11-07 08:17:27,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-07 08:17:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 837. [2021-11-07 08:17:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 1.4880382775119618) internal successors, (1244), 836 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1244 transitions. [2021-11-07 08:17:28,014 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1244 transitions. Word has length 161 [2021-11-07 08:17:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:28,014 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1244 transitions. [2021-11-07 08:17:28,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1244 transitions. [2021-11-07 08:17:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 08:17:28,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:28,016 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:28,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-11-07 08:17:28,016 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2082392209, now seen corresponding path program 1 times [2021-11-07 08:17:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:28,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168648936] [2021-11-07 08:17:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:28,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-07 08:17:28,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:28,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168648936] [2021-11-07 08:17:28,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168648936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:28,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:28,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:28,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697966187] [2021-11-07 08:17:28,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:28,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:28,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:28,084 INFO L87 Difference]: Start difference. First operand 837 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:29,609 INFO L93 Difference]: Finished difference Result 1783 states and 2644 transitions. [2021-11-07 08:17:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-07 08:17:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:29,611 INFO L225 Difference]: With dead ends: 1783 [2021-11-07 08:17:29,611 INFO L226 Difference]: Without dead ends: 969 [2021-11-07 08:17:29,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-07 08:17:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 897. [2021-11-07 08:17:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 1.4888392857142858) internal successors, (1334), 896 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1334 transitions. [2021-11-07 08:17:29,667 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1334 transitions. Word has length 161 [2021-11-07 08:17:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:29,667 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1334 transitions. [2021-11-07 08:17:29,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1334 transitions. [2021-11-07 08:17:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 08:17:29,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:29,669 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-07 08:17:29,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-11-07 08:17:29,670 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1397868574, now seen corresponding path program 1 times [2021-11-07 08:17:29,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:29,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592931216] [2021-11-07 08:17:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:29,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-07 08:17:29,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:29,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592931216] [2021-11-07 08:17:29,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592931216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:29,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:29,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:29,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93554178] [2021-11-07 08:17:29,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:29,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:29,743 INFO L87 Difference]: Start difference. First operand 897 states and 1334 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:30,842 INFO L93 Difference]: Finished difference Result 1821 states and 2710 transitions. [2021-11-07 08:17:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:30,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-07 08:17:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:30,844 INFO L225 Difference]: With dead ends: 1821 [2021-11-07 08:17:30,844 INFO L226 Difference]: Without dead ends: 947 [2021-11-07 08:17:30,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-07 08:17:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 897. [2021-11-07 08:17:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 1.4866071428571428) internal successors, (1332), 896 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1332 transitions. [2021-11-07 08:17:30,881 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1332 transitions. Word has length 161 [2021-11-07 08:17:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:30,881 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1332 transitions. [2021-11-07 08:17:30,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1332 transitions. [2021-11-07 08:17:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 08:17:30,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:30,882 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:30,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-11-07 08:17:30,883 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2090379429, now seen corresponding path program 1 times [2021-11-07 08:17:30,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:30,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601236096] [2021-11-07 08:17:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:30,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-07 08:17:30,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:30,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601236096] [2021-11-07 08:17:30,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601236096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:30,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:30,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:30,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051293192] [2021-11-07 08:17:30,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:30,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:30,944 INFO L87 Difference]: Start difference. First operand 897 states and 1332 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:32,973 INFO L93 Difference]: Finished difference Result 1839 states and 2724 transitions. [2021-11-07 08:17:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-07 08:17:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:32,974 INFO L225 Difference]: With dead ends: 1839 [2021-11-07 08:17:32,974 INFO L226 Difference]: Without dead ends: 965 [2021-11-07 08:17:32,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-07 08:17:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 899. [2021-11-07 08:17:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.4855233853006682) internal successors, (1334), 898 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1334 transitions. [2021-11-07 08:17:33,011 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1334 transitions. Word has length 162 [2021-11-07 08:17:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:33,011 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1334 transitions. [2021-11-07 08:17:33,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1334 transitions. [2021-11-07 08:17:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 08:17:33,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:33,012 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-07 08:17:33,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-11-07 08:17:33,012 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1714251590, now seen corresponding path program 1 times [2021-11-07 08:17:33,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:33,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793818149] [2021-11-07 08:17:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:33,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-07 08:17:33,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:33,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793818149] [2021-11-07 08:17:33,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793818149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:33,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:33,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:33,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069369586] [2021-11-07 08:17:33,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:33,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:33,072 INFO L87 Difference]: Start difference. First operand 899 states and 1334 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:35,408 INFO L93 Difference]: Finished difference Result 1821 states and 2706 transitions. [2021-11-07 08:17:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 162 [2021-11-07 08:17:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:35,410 INFO L225 Difference]: With dead ends: 1821 [2021-11-07 08:17:35,410 INFO L226 Difference]: Without dead ends: 945 [2021-11-07 08:17:35,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-11-07 08:17:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 899. [2021-11-07 08:17:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.4832962138084633) internal successors, (1332), 898 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1332 transitions. [2021-11-07 08:17:35,445 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1332 transitions. Word has length 162 [2021-11-07 08:17:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:35,445 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1332 transitions. [2021-11-07 08:17:35,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1332 transitions. [2021-11-07 08:17:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 08:17:35,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:35,446 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:35,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-11-07 08:17:35,446 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1165663926, now seen corresponding path program 1 times [2021-11-07 08:17:35,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:35,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996836118] [2021-11-07 08:17:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:35,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:35,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:35,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996836118] [2021-11-07 08:17:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996836118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:35,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:35,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:35,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066895928] [2021-11-07 08:17:35,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:35,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:35,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:35,504 INFO L87 Difference]: Start difference. First operand 899 states and 1332 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:36,406 INFO L93 Difference]: Finished difference Result 1841 states and 2720 transitions. [2021-11-07 08:17:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-07 08:17:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:36,407 INFO L225 Difference]: With dead ends: 1841 [2021-11-07 08:17:36,407 INFO L226 Difference]: Without dead ends: 965 [2021-11-07 08:17:36,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-07 08:17:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 923. [2021-11-07 08:17:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.475054229934924) internal successors, (1360), 922 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1360 transitions. [2021-11-07 08:17:36,442 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1360 transitions. Word has length 163 [2021-11-07 08:17:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:36,442 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1360 transitions. [2021-11-07 08:17:36,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1360 transitions. [2021-11-07 08:17:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 08:17:36,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:36,443 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:36,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-11-07 08:17:36,443 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash -502693233, now seen corresponding path program 1 times [2021-11-07 08:17:36,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:36,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923905241] [2021-11-07 08:17:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:36,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:17:36,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:36,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923905241] [2021-11-07 08:17:36,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923905241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:36,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:36,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:36,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260173912] [2021-11-07 08:17:36,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:36,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:36,496 INFO L87 Difference]: Start difference. First operand 923 states and 1360 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:38,083 INFO L93 Difference]: Finished difference Result 1857 states and 2736 transitions. [2021-11-07 08:17:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-07 08:17:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:38,085 INFO L225 Difference]: With dead ends: 1857 [2021-11-07 08:17:38,085 INFO L226 Difference]: Without dead ends: 953 [2021-11-07 08:17:38,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-11-07 08:17:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 921. [2021-11-07 08:17:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.4739130434782608) internal successors, (1356), 920 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1356 transitions. [2021-11-07 08:17:38,129 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1356 transitions. Word has length 164 [2021-11-07 08:17:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:38,129 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1356 transitions. [2021-11-07 08:17:38,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1356 transitions. [2021-11-07 08:17:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 08:17:38,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:38,130 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:17:38,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-11-07 08:17:38,131 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1490859177, now seen corresponding path program 1 times [2021-11-07 08:17:38,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:38,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022972995] [2021-11-07 08:17:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:38,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-07 08:17:38,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:38,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022972995] [2021-11-07 08:17:38,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022972995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:38,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:38,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:17:38,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023444543] [2021-11-07 08:17:38,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:38,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:38,315 INFO L87 Difference]: Start difference. First operand 921 states and 1356 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:41,533 INFO L93 Difference]: Finished difference Result 1977 states and 2926 transitions. [2021-11-07 08:17:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:17:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 164 [2021-11-07 08:17:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:41,535 INFO L225 Difference]: With dead ends: 1977 [2021-11-07 08:17:41,535 INFO L226 Difference]: Without dead ends: 1079 [2021-11-07 08:17:41,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:17:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-11-07 08:17:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 987. [2021-11-07 08:17:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 1.4949290060851927) internal successors, (1474), 986 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1474 transitions. [2021-11-07 08:17:41,589 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1474 transitions. Word has length 164 [2021-11-07 08:17:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:41,590 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 1474 transitions. [2021-11-07 08:17:41,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1474 transitions. [2021-11-07 08:17:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-07 08:17:41,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:41,592 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:41,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-11-07 08:17:41,592 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash 560932923, now seen corresponding path program 1 times [2021-11-07 08:17:41,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:41,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104599571] [2021-11-07 08:17:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:41,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-07 08:17:41,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:41,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104599571] [2021-11-07 08:17:41,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104599571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:41,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:41,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:41,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191808990] [2021-11-07 08:17:41,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:41,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:41,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:41,671 INFO L87 Difference]: Start difference. First operand 987 states and 1474 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:43,333 INFO L93 Difference]: Finished difference Result 2003 states and 2990 transitions. [2021-11-07 08:17:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:43,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-07 08:17:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:43,334 INFO L225 Difference]: With dead ends: 2003 [2021-11-07 08:17:43,334 INFO L226 Difference]: Without dead ends: 1039 [2021-11-07 08:17:43,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-11-07 08:17:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 987. [2021-11-07 08:17:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 1.4929006085192698) internal successors, (1472), 986 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1472 transitions. [2021-11-07 08:17:43,372 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1472 transitions. Word has length 167 [2021-11-07 08:17:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:43,373 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 1472 transitions. [2021-11-07 08:17:43,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1472 transitions. [2021-11-07 08:17:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 08:17:43,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:43,374 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:43,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-11-07 08:17:43,374 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:43,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2125185477, now seen corresponding path program 1 times [2021-11-07 08:17:43,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:43,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264793287] [2021-11-07 08:17:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:43,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-07 08:17:43,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:43,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264793287] [2021-11-07 08:17:43,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264793287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:43,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:43,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:17:43,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555417562] [2021-11-07 08:17:43,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:17:43,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:43,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:17:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:17:43,445 INFO L87 Difference]: Start difference. First operand 987 states and 1472 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:45,186 INFO L93 Difference]: Finished difference Result 1999 states and 2982 transitions. [2021-11-07 08:17:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:17:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-07 08:17:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:45,188 INFO L225 Difference]: With dead ends: 1999 [2021-11-07 08:17:45,188 INFO L226 Difference]: Without dead ends: 1035 [2021-11-07 08:17:45,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-11-07 08:17:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 987. [2021-11-07 08:17:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 1.4908722109533468) internal successors, (1470), 986 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1470 transitions. [2021-11-07 08:17:45,226 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1470 transitions. Word has length 168 [2021-11-07 08:17:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:45,226 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 1470 transitions. [2021-11-07 08:17:45,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1470 transitions. [2021-11-07 08:17:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 08:17:45,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:45,228 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:17:45,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-11-07 08:17:45,228 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash -667829280, now seen corresponding path program 1 times [2021-11-07 08:17:45,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:45,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695340069] [2021-11-07 08:17:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:45,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-07 08:17:45,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:45,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695340069] [2021-11-07 08:17:45,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695340069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:17:45,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:17:45,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:17:45,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9518496] [2021-11-07 08:17:45,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:17:45,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:17:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:17:45,508 INFO L87 Difference]: Start difference. First operand 987 states and 1470 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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) [2021-11-07 08:17:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:47,783 INFO L93 Difference]: Finished difference Result 1971 states and 2936 transitions. [2021-11-07 08:17:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:17:47,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 169 [2021-11-07 08:17:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:47,785 INFO L225 Difference]: With dead ends: 1971 [2021-11-07 08:17:47,785 INFO L226 Difference]: Without dead ends: 987 [2021-11-07 08:17:47,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:17:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-11-07 08:17:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 987. [2021-11-07 08:17:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 1.4898580121703855) internal successors, (1469), 986 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1469 transitions. [2021-11-07 08:17:47,821 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1469 transitions. Word has length 169 [2021-11-07 08:17:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:47,821 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 1469 transitions. [2021-11-07 08:17:47,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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) [2021-11-07 08:17:47,821 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1469 transitions. [2021-11-07 08:17:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 08:17:47,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:47,822 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:17:47,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-11-07 08:17:47,823 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:47,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2075555230, now seen corresponding path program 1 times [2021-11-07 08:17:47,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:47,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396336129] [2021-11-07 08:17:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:47,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 169 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:17:48,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:48,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396336129] [2021-11-07 08:17:48,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396336129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:48,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140724870] [2021-11-07 08:17:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:48,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:48,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:48,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:17:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 08:17:49,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2452 treesize of output 2449 [2021-11-07 08:17:49,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2494 treesize of output 2433 [2021-11-07 08:17:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:49,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:56,290 WARN L207 SmtUtils]: Spent 6.92 s on a formula simplification. DAG size of input: 229 DAG size of output: 74 [2021-11-07 08:17:56,291 INFO L354 Elim1Store]: treesize reduction 1604, result has 11.3 percent of original size [2021-11-07 08:17:56,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 2947 treesize of output 2395 [2021-11-07 08:17:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:17:58,672 INFO L354 Elim1Store]: treesize reduction 1752, result has 16.1 percent of original size [2021-11-07 08:17:58,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 3351 treesize of output 2897 [2021-11-07 08:17:59,301 INFO L354 Elim1Store]: treesize reduction 494, result has 7.3 percent of original size [2021-11-07 08:17:59,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 3922 treesize of output 3903 [2021-11-07 08:17:59,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:00,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:18:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 163 [2021-11-07 08:18:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:00,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:18:00,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 163 [2021-11-07 08:18:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:00,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 77 [2021-11-07 08:18:00,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 1446 treesize of output 832 [2021-11-07 08:18:01,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:01,601 INFO L354 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2021-11-07 08:18:01,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 796 treesize of output 553 [2021-11-07 08:18:02,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 61 [2021-11-07 08:18:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:02,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 115 [2021-11-07 08:18:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:03,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:03,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:03,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:03,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:03,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:03,184 INFO L354 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2021-11-07 08:18:03,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 794 treesize of output 533 [2021-11-07 08:18:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:03,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Unexpected substitution problem. [2021-11-07 08:18:03,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:18:03,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-07 08:18:03,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274722427] [2021-11-07 08:18:03,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:18:03,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:03,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:18:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:18:03,840 INFO L87 Difference]: Start difference. First operand 987 states and 1469 transitions. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:11,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:11,512 INFO L93 Difference]: Finished difference Result 3165 states and 4723 transitions. [2021-11-07 08:18:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:18:11,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 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 169 [2021-11-07 08:18:11,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:11,515 INFO L225 Difference]: With dead ends: 3165 [2021-11-07 08:18:11,515 INFO L226 Difference]: Without dead ends: 2201 [2021-11-07 08:18:11,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:18:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-11-07 08:18:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1840. [2021-11-07 08:18:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.4899401848830887) internal successors, (2740), 1839 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2740 transitions. [2021-11-07 08:18:11,601 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2740 transitions. Word has length 169 [2021-11-07 08:18:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:11,602 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 2740 transitions. [2021-11-07 08:18:11,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2740 transitions. [2021-11-07 08:18:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-07 08:18:11,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:11,603 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:18:11,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 08:18:11,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-07 08:18:11,804 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:11,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1429123327, now seen corresponding path program 1 times [2021-11-07 08:18:11,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:11,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144772157] [2021-11-07 08:18:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:11,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-07 08:18:11,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:11,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144772157] [2021-11-07 08:18:11,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144772157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:11,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:11,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:18:11,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711455274] [2021-11-07 08:18:11,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:18:11,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:18:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:18:11,913 INFO L87 Difference]: Start difference. First operand 1840 states and 2740 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:14,396 INFO L93 Difference]: Finished difference Result 2932 states and 4353 transitions. [2021-11-07 08:18:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:18:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 173 [2021-11-07 08:18:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:14,398 INFO L225 Difference]: With dead ends: 2932 [2021-11-07 08:18:14,398 INFO L226 Difference]: Without dead ends: 1968 [2021-11-07 08:18:14,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:18:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-11-07 08:18:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1840. [2021-11-07 08:18:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.4877650897226753) internal successors, (2736), 1839 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2736 transitions. [2021-11-07 08:18:14,472 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2736 transitions. Word has length 173 [2021-11-07 08:18:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:14,472 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 2736 transitions. [2021-11-07 08:18:14,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2736 transitions. [2021-11-07 08:18:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 08:18:14,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:14,473 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:18:14,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-11-07 08:18:14,474 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1287801071, now seen corresponding path program 1 times [2021-11-07 08:18:14,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:14,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589561292] [2021-11-07 08:18:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:14,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-07 08:18:14,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:14,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589561292] [2021-11-07 08:18:14,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589561292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:14,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:14,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:18:14,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039788662] [2021-11-07 08:18:14,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:18:14,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:18:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:18:14,553 INFO L87 Difference]: Start difference. First operand 1840 states and 2736 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:17,099 INFO L93 Difference]: Finished difference Result 2932 states and 4347 transitions. [2021-11-07 08:18:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:18:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 174 [2021-11-07 08:18:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:17,102 INFO L225 Difference]: With dead ends: 2932 [2021-11-07 08:18:17,103 INFO L226 Difference]: Without dead ends: 1968 [2021-11-07 08:18:17,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:18:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-11-07 08:18:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1840. [2021-11-07 08:18:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.4855899945622622) internal successors, (2732), 1839 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2732 transitions. [2021-11-07 08:18:17,198 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2732 transitions. Word has length 174 [2021-11-07 08:18:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:17,198 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 2732 transitions. [2021-11-07 08:18:17,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2732 transitions. [2021-11-07 08:18:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-07 08:18:17,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:17,200 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:18:17,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-11-07 08:18:17,200 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 62984262, now seen corresponding path program 1 times [2021-11-07 08:18:17,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:17,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366986868] [2021-11-07 08:18:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:17,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-07 08:18:17,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:17,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366986868] [2021-11-07 08:18:17,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366986868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:17,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:17,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:18:17,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141129201] [2021-11-07 08:18:17,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:18:17,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:18:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:18:17,283 INFO L87 Difference]: Start difference. First operand 1840 states and 2732 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:19,731 INFO L93 Difference]: Finished difference Result 2932 states and 4341 transitions. [2021-11-07 08:18:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:18:19,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-07 08:18:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:19,733 INFO L225 Difference]: With dead ends: 2932 [2021-11-07 08:18:19,733 INFO L226 Difference]: Without dead ends: 1968 [2021-11-07 08:18:19,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:18:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-11-07 08:18:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1840. [2021-11-07 08:18:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.4834148994018488) internal successors, (2728), 1839 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2728 transitions. [2021-11-07 08:18:19,840 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2728 transitions. Word has length 175 [2021-11-07 08:18:19,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:19,841 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 2728 transitions. [2021-11-07 08:18:19,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2728 transitions. [2021-11-07 08:18:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-07 08:18:19,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:19,842 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:18:19,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-11-07 08:18:19,842 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:19,843 INFO L85 PathProgramCache]: Analyzing trace with hash 252419318, now seen corresponding path program 1 times [2021-11-07 08:18:19,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:19,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931126023] [2021-11-07 08:18:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:19,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-07 08:18:19,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:19,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931126023] [2021-11-07 08:18:19,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931126023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:19,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:19,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:18:19,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615829731] [2021-11-07 08:18:19,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:18:19,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:18:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:18:19,918 INFO L87 Difference]: Start difference. First operand 1840 states and 2728 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:22,336 INFO L93 Difference]: Finished difference Result 2912 states and 4311 transitions. [2021-11-07 08:18:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:18:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 176 [2021-11-07 08:18:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:22,338 INFO L225 Difference]: With dead ends: 2912 [2021-11-07 08:18:22,338 INFO L226 Difference]: Without dead ends: 1948 [2021-11-07 08:18:22,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:18:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-11-07 08:18:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1840. [2021-11-07 08:18:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.4812398042414356) internal successors, (2724), 1839 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2724 transitions. [2021-11-07 08:18:22,416 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2724 transitions. Word has length 176 [2021-11-07 08:18:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:22,416 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 2724 transitions. [2021-11-07 08:18:22,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2724 transitions. [2021-11-07 08:18:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 08:18:22,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:22,417 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:18:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-11-07 08:18:22,418 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 690621438, now seen corresponding path program 1 times [2021-11-07 08:18:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:22,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012397878] [2021-11-07 08:18:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:22,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-07 08:18:22,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:22,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012397878] [2021-11-07 08:18:22,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012397878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:22,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:22,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:18:22,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542568572] [2021-11-07 08:18:22,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:18:22,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:18:22,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:18:22,574 INFO L87 Difference]: Start difference. First operand 1840 states and 2724 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:24,149 INFO L93 Difference]: Finished difference Result 4180 states and 6242 transitions. [2021-11-07 08:18:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:18:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 179 [2021-11-07 08:18:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:24,151 INFO L225 Difference]: With dead ends: 4180 [2021-11-07 08:18:24,151 INFO L226 Difference]: Without dead ends: 2363 [2021-11-07 08:18:24,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:18:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-11-07 08:18:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1998. [2021-11-07 08:18:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 1.5072608913370056) internal successors, (3010), 1997 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3010 transitions. [2021-11-07 08:18:24,247 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3010 transitions. Word has length 179 [2021-11-07 08:18:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:24,247 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 3010 transitions. [2021-11-07 08:18:24,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3010 transitions. [2021-11-07 08:18:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 08:18:24,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:24,249 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-07 08:18:24,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-11-07 08:18:24,249 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -306768197, now seen corresponding path program 1 times [2021-11-07 08:18:24,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:24,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209206674] [2021-11-07 08:18:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:24,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-07 08:18:24,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:24,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209206674] [2021-11-07 08:18:24,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209206674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:24,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:24,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:18:24,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199020129] [2021-11-07 08:18:24,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:18:24,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:18:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:18:24,380 INFO L87 Difference]: Start difference. First operand 1998 states and 3010 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:25,405 INFO L93 Difference]: Finished difference Result 4384 states and 6632 transitions. [2021-11-07 08:18:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:18:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 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 180 [2021-11-07 08:18:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:25,408 INFO L225 Difference]: With dead ends: 4384 [2021-11-07 08:18:25,408 INFO L226 Difference]: Without dead ends: 2409 [2021-11-07 08:18:25,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:18:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-11-07 08:18:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2106. [2021-11-07 08:18:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 1.5344418052256532) internal successors, (3230), 2105 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3230 transitions. [2021-11-07 08:18:25,508 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3230 transitions. Word has length 180 [2021-11-07 08:18:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:25,509 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 3230 transitions. [2021-11-07 08:18:25,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3230 transitions. [2021-11-07 08:18:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-07 08:18:25,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:25,511 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:25,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-11-07 08:18:25,511 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1351745823, now seen corresponding path program 1 times [2021-11-07 08:18:25,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:25,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187583630] [2021-11-07 08:18:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:25,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 68 proven. 279 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:18:26,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:26,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187583630] [2021-11-07 08:18:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187583630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:26,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520819276] [2021-11-07 08:18:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:26,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:26,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:26,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:18:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 08:18:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:36,420 WARN L207 SmtUtils]: Spent 9.71 s on a formula simplification. DAG size of input: 66 DAG size of output: 15 [2021-11-07 08:18:36,421 INFO L354 Elim1Store]: treesize reduction 212, result has 9.0 percent of original size [2021-11-07 08:18:36,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 2458 treesize of output 2457 [2021-11-07 08:18:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2445 treesize of output 2442 [2021-11-07 08:18:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 3478 treesize of output 3158 [2021-11-07 08:18:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:36,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2798 treesize of output 2424 [2021-11-07 08:18:36,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2979 treesize of output 2773 [2021-11-07 08:18:36,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-07 08:18:36,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:18:36,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-07 08:18:36,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305026737] [2021-11-07 08:18:36,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:18:36,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:18:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:18:36,563 INFO L87 Difference]: Start difference. First operand 2106 states and 3230 transitions. Second operand has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:18:36,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:36,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:36,781 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3162b2e2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 08:18:36,786 INFO L168 Benchmark]: Toolchain (without parser) took 244274.37 ms. Allocated memory was 96.5 MB in the beginning and 199.2 MB in the end (delta: 102.8 MB). Free memory was 53.4 MB in the beginning and 56.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 99.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:18:36,786 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:18:36,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 814.60 ms. Allocated memory is still 96.5 MB. Free memory was 53.1 MB in the beginning and 51.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:18:36,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 113.30 ms. Allocated memory is still 96.5 MB. Free memory was 51.7 MB in the beginning and 46.6 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 08:18:36,787 INFO L168 Benchmark]: Boogie Preprocessor took 118.49 ms. Allocated memory is still 96.5 MB. Free memory was 46.6 MB in the beginning and 39.7 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 08:18:36,787 INFO L168 Benchmark]: RCFGBuilder took 3095.70 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 39.5 MB in the beginning and 74.1 MB in the end (delta: -34.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:18:36,788 INFO L168 Benchmark]: TraceAbstraction took 240123.80 ms. Allocated memory was 125.8 MB in the beginning and 199.2 MB in the end (delta: 73.4 MB). Free memory was 73.3 MB in the beginning and 56.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 89.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:18:36,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 814.60 ms. Allocated memory is still 96.5 MB. Free memory was 53.1 MB in the beginning and 51.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 113.30 ms. Allocated memory is still 96.5 MB. Free memory was 51.7 MB in the beginning and 46.6 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 118.49 ms. Allocated memory is still 96.5 MB. Free memory was 46.6 MB in the beginning and 39.7 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3095.70 ms. Allocated memory was 96.5 MB in the beginning and 125.8 MB in the end (delta: 29.4 MB). Free memory was 39.5 MB in the beginning and 74.1 MB in the end (delta: -34.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 240123.80 ms. Allocated memory was 125.8 MB in the beginning and 199.2 MB in the end (delta: 73.4 MB). Free memory was 73.3 MB in the beginning and 56.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 89.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3162b2e2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3162b2e2: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-07 08:18:36,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:18:39,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:18:39,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:18:39,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:18:39,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:18:39,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:18:39,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:18:39,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:18:39,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:18:39,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:18:39,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:18:39,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:18:39,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:18:39,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:18:39,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:18:39,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:18:39,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:18:39,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:18:39,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:18:39,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:18:39,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:18:39,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:18:39,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:18:39,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:18:39,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:18:39,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:18:39,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:18:39,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:18:39,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:18:39,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:18:39,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:18:39,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:18:39,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:18:39,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:18:39,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:18:39,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:18:39,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:18:39,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:18:39,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:18:39,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:18:39,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:18:39,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-07 08:18:39,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:18:39,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:18:39,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:18:39,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:18:39,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:18:39,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:18:39,602 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:18:39,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:18:39,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:18:39,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:18:39,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:18:39,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:18:39,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:18:39,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:18:39,605 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 08:18:39,606 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 08:18:39,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:18:39,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:18:39,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:18:39,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:18:39,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:18:39,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:18:39,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:18:39,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:18:39,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:18:39,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:18:39,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:18:39,610 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 08:18:39,610 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 08:18:39,610 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:18:39,611 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:18:39,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:18:39,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:18:39,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 08:18:39,612 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-11-07 08:18:40,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:18:40,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:18:40,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:18:40,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:18:40,060 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:18:40,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 08:18:40,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/a83fcd401/a6c412f0634c402cba194cb4e3cf79fc/FLAGd2cce2149 [2021-11-07 08:18:40,940 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:18:40,940 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-07 08:18:40,976 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/a83fcd401/a6c412f0634c402cba194cb4e3cf79fc/FLAGd2cce2149 [2021-11-07 08:18:41,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/data/a83fcd401/a6c412f0634c402cba194cb4e3cf79fc [2021-11-07 08:18:41,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:18:41,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:18:41,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:18:41,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:18:41,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:18:41,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:18:41" (1/1) ... [2021-11-07 08:18:41,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756746ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:41, skipping insertion in model container [2021-11-07 08:18:41,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:18:41" (1/1) ... [2021-11-07 08:18:41,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:18:41,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:18:41,783 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_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 08:18:41,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:18:41,842 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:18:41,964 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_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-07 08:18:41,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:18:42,017 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:18:42,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42 WrapperNode [2021-11-07 08:18:42,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:18:42,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:18:42,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:18:42,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:18:42,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:18:42,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:18:42,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:18:42,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:18:42,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:18:42,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:18:42,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:18:42,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:18:42,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (1/1) ... [2021-11-07 08:18:42,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:18:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:42,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:18:42,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:18:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 08:18:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:18:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:18:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 08:18:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:18:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:18:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:18:42,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:18:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 08:18:42,592 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 08:18:46,964 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 08:18:46,964 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 08:18:46,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:18:46,980 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 08:18:46,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:18:46 BoogieIcfgContainer [2021-11-07 08:18:46,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:18:46,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:18:46,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:18:46,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:18:46,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:18:41" (1/3) ... [2021-11-07 08:18:46,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@937e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:18:46, skipping insertion in model container [2021-11-07 08:18:46,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:18:42" (2/3) ... [2021-11-07 08:18:46,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@937e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:18:46, skipping insertion in model container [2021-11-07 08:18:46,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:18:46" (3/3) ... [2021-11-07 08:18:46,993 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2021-11-07 08:18:47,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:18:47,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:18:47,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:18:47,078 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=PETRI_NET, 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 [2021-11-07 08:18:47,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:18:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:18:47,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:47,108 INFO L513 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] [2021-11-07 08:18:47,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash 918516044, now seen corresponding path program 1 times [2021-11-07 08:18:47,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:18:47,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939721244] [2021-11-07 08:18:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:47,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:18:47,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:18:47,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:18:47,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:18:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:18:47,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:18:47,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:18:47,815 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-07 08:18:47,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 22 [2021-11-07 08:18:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:47,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-07 08:18:47,979 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-07 08:18:47,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:18:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:18:48,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 08:18:48,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 08:18:48,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-07 08:18:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:48,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:18:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:48,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:18:48,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939721244] [2021-11-07 08:18:48,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939721244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:48,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:48,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 08:18:48,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648646830] [2021-11-07 08:18:48,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:18:48,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:18:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:18:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:18:48,914 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:55,901 INFO L93 Difference]: Finished difference Result 311 states and 527 transitions. [2021-11-07 08:18:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:18:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 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 44 [2021-11-07 08:18:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:55,915 INFO L225 Difference]: With dead ends: 311 [2021-11-07 08:18:55,915 INFO L226 Difference]: Without dead ends: 142 [2021-11-07 08:18:55,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:18:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-07 08:18:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-07 08:18:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.553191489361702) internal successors, (219), 141 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 219 transitions. [2021-11-07 08:18:55,963 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 219 transitions. Word has length 44 [2021-11-07 08:18:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:55,964 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 219 transitions. [2021-11-07 08:18:55,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 219 transitions. [2021-11-07 08:18:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:18:55,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:55,967 INFO L513 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] [2021-11-07 08:18:55,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:56,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:18:56,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1166662538, now seen corresponding path program 1 times [2021-11-07 08:18:56,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:18:56,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422432814] [2021-11-07 08:18:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:56,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:18:56,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:18:56,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:18:56,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:18:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:56,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:18:56,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:56,606 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:18:56,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:18:56,689 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:18:56,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:18:56,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:18:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:56,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:18:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:57,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:18:57,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422432814] [2021-11-07 08:18:57,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422432814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:18:57,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:18:57,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:18:57,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328622194] [2021-11-07 08:18:57,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:18:57,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:18:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:18:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:18:57,232 INFO L87 Difference]: Start difference. First operand 142 states and 219 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:01,140 INFO L93 Difference]: Finished difference Result 302 states and 466 transitions. [2021-11-07 08:19:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:19:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-07 08:19:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:01,152 INFO L225 Difference]: With dead ends: 302 [2021-11-07 08:19:01,153 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 08:19:01,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:19:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 08:19:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2021-11-07 08:19:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 152 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 238 transitions. [2021-11-07 08:19:01,170 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 238 transitions. Word has length 44 [2021-11-07 08:19:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:01,171 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 238 transitions. [2021-11-07 08:19:01,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 238 transitions. [2021-11-07 08:19:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:19:01,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:01,175 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:01,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:19:01,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:19:01,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash -616728635, now seen corresponding path program 1 times [2021-11-07 08:19:01,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:19:01,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55995442] [2021-11-07 08:19:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:01,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:19:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:19:01,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:19:01,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:19:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:19:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:01,879 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:19:01,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:19:01,975 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:19:01,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:19:02,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:19:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:02,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:02,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:19:02,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55995442] [2021-11-07 08:19:02,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55995442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:19:02,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:19:02,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:19:02,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567758389] [2021-11-07 08:19:02,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:19:02,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:19:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:19:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:19:02,728 INFO L87 Difference]: Start difference. First operand 153 states and 238 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:12,558 INFO L93 Difference]: Finished difference Result 425 states and 659 transitions. [2021-11-07 08:19:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:19:12,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 08:19:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:12,563 INFO L225 Difference]: With dead ends: 425 [2021-11-07 08:19:12,563 INFO L226 Difference]: Without dead ends: 293 [2021-11-07 08:19:12,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:19:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-07 08:19:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 169. [2021-11-07 08:19:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5654761904761905) internal successors, (263), 168 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2021-11-07 08:19:12,589 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 57 [2021-11-07 08:19:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:12,590 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2021-11-07 08:19:12,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2021-11-07 08:19:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:19:12,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:12,594 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:12,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 08:19:12,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:19:12,817 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2106199760, now seen corresponding path program 1 times [2021-11-07 08:19:12,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:19:12,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48788832] [2021-11-07 08:19:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:12,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:19:12,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:19:12,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:19:12,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:19:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:19:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2021-11-07 08:19:13,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2021-11-07 08:19:14,551 INFO L354 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2021-11-07 08:19:14,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 31 [2021-11-07 08:19:14,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:19:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:14,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:15,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:19:15,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48788832] [2021-11-07 08:19:15,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48788832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:19:15,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:19:15,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:19:15,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143225917] [2021-11-07 08:19:15,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:19:15,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:19:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:19:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:19:15,099 INFO L87 Difference]: Start difference. First operand 169 states and 263 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:19,153 INFO L93 Difference]: Finished difference Result 346 states and 538 transitions. [2021-11-07 08:19:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:19:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 08:19:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:19,157 INFO L225 Difference]: With dead ends: 346 [2021-11-07 08:19:19,157 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 08:19:19,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:19:19,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 08:19:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2021-11-07 08:19:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.5706521739130435) internal successors, (289), 184 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 289 transitions. [2021-11-07 08:19:19,171 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 289 transitions. Word has length 58 [2021-11-07 08:19:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 289 transitions. [2021-11-07 08:19:19,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 289 transitions. [2021-11-07 08:19:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:19:19,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:19,175 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:19,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:19:19,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:19:19,393 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash -77177339, now seen corresponding path program 1 times [2021-11-07 08:19:19,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:19:19,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394894945] [2021-11-07 08:19:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:19,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:19:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:19:19,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:19:19,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:19:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:19,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:19:19,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:19,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:19:20,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:19:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:20,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:20,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:19:20,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394894945] [2021-11-07 08:19:20,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394894945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:19:20,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:19:20,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:19:20,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307226343] [2021-11-07 08:19:20,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:19:20,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:19:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:19:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:19:20,512 INFO L87 Difference]: Start difference. First operand 185 states and 289 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:27,211 INFO L93 Difference]: Finished difference Result 583 states and 912 transitions. [2021-11-07 08:19:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:19:27,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 58 [2021-11-07 08:19:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:27,217 INFO L225 Difference]: With dead ends: 583 [2021-11-07 08:19:27,217 INFO L226 Difference]: Without dead ends: 419 [2021-11-07 08:19:27,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:19:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-07 08:19:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 225. [2021-11-07 08:19:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6116071428571428) internal successors, (361), 224 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 361 transitions. [2021-11-07 08:19:27,254 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 361 transitions. Word has length 58 [2021-11-07 08:19:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:27,258 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 361 transitions. [2021-11-07 08:19:27,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 361 transitions. [2021-11-07 08:19:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:19:27,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:27,268 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:27,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:19:27,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:19:27,483 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1661273492, now seen corresponding path program 1 times [2021-11-07 08:19:27,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:19:27,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831945824] [2021-11-07 08:19:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:27,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:19:27,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:19:27,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:19:27,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 08:19:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:19:27,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:27,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:19:28,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:19:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:28,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:28,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:19:28,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831945824] [2021-11-07 08:19:28,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831945824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:19:28,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:19:28,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:19:28,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170841057] [2021-11-07 08:19:28,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:19:28,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:19:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:19:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:19:28,576 INFO L87 Difference]: Start difference. First operand 225 states and 361 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:36,811 INFO L93 Difference]: Finished difference Result 639 states and 1019 transitions. [2021-11-07 08:19:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:19:36,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 59 [2021-11-07 08:19:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:36,816 INFO L225 Difference]: With dead ends: 639 [2021-11-07 08:19:36,816 INFO L226 Difference]: Without dead ends: 435 [2021-11-07 08:19:36,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:19:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-07 08:19:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 249. [2021-11-07 08:19:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.6451612903225807) internal successors, (408), 248 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 408 transitions. [2021-11-07 08:19:36,831 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 408 transitions. Word has length 59 [2021-11-07 08:19:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:36,831 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 408 transitions. [2021-11-07 08:19:36,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 408 transitions. [2021-11-07 08:19:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 08:19:36,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:36,834 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:36,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:19:37,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:19:37,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1795681455, now seen corresponding path program 1 times [2021-11-07 08:19:37,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:19:37,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306402557] [2021-11-07 08:19:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:37,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:19:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:19:37,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:19:37,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 08:19:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:37,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:19:37,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:37,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:19:37,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:19:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:37,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:38,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:19:38,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306402557] [2021-11-07 08:19:38,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306402557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:19:38,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:19:38,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:19:38,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885351584] [2021-11-07 08:19:38,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:19:38,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:19:38,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:19:38,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:19:38,338 INFO L87 Difference]: Start difference. First operand 249 states and 408 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:44,875 INFO L93 Difference]: Finished difference Result 736 states and 1200 transitions. [2021-11-07 08:19:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:19:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 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 87 [2021-11-07 08:19:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:44,882 INFO L225 Difference]: With dead ends: 736 [2021-11-07 08:19:44,882 INFO L226 Difference]: Without dead ends: 508 [2021-11-07 08:19:44,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:19:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-07 08:19:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 313. [2021-11-07 08:19:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.6730769230769231) internal successors, (522), 312 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 522 transitions. [2021-11-07 08:19:44,899 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 522 transitions. Word has length 87 [2021-11-07 08:19:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:44,899 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 522 transitions. [2021-11-07 08:19:44,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 522 transitions. [2021-11-07 08:19:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 08:19:44,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:44,902 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:44,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:19:45,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:19:45,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash -128936593, now seen corresponding path program 1 times [2021-11-07 08:19:45,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:19:45,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656340238] [2021-11-07 08:19:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:45,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:19:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:19:45,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:19:45,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 08:19:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:19:45,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:45,678 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:19:45,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:19:45,749 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:19:45,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:19:45,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:19:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:19:46,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:19:46,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:19:46,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656340238] [2021-11-07 08:19:46,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656340238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:19:46,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:19:46,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:19:46,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007067372] [2021-11-07 08:19:46,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:19:46,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:19:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:19:46,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:19:46,596 INFO L87 Difference]: Start difference. First operand 313 states and 522 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2021-11-07 08:19:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:52,379 INFO L93 Difference]: Finished difference Result 703 states and 1151 transitions. [2021-11-07 08:19:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:19:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 87 [2021-11-07 08:19:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:52,383 INFO L225 Difference]: With dead ends: 703 [2021-11-07 08:19:52,383 INFO L226 Difference]: Without dead ends: 411 [2021-11-07 08:19:52,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:19:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-07 08:19:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 313. [2021-11-07 08:19:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.6570512820512822) internal successors, (517), 312 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:19:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 517 transitions. [2021-11-07 08:19:52,398 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 517 transitions. Word has length 87 [2021-11-07 08:19:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:52,398 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 517 transitions. [2021-11-07 08:19:52,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2021-11-07 08:19:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 517 transitions. [2021-11-07 08:19:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:19:52,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:52,401 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:52,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:19:52,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:19:52,618 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:52,618 INFO L85 PathProgramCache]: Analyzing trace with hash -530893114, now seen corresponding path program 1 times [2021-11-07 08:19:52,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:19:52,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065136335] [2021-11-07 08:19:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:52,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:19:52,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:19:52,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:19:52,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 08:19:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:53,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:19:53,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:53,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:19:53,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:19:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:53,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:19:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:19:54,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:19:54,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065136335] [2021-11-07 08:19:54,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065136335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:19:54,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:19:54,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:19:54,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814513205] [2021-11-07 08:19:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:19:54,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:19:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:19:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:19:54,030 INFO L87 Difference]: Start difference. First operand 313 states and 517 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:01,221 INFO L93 Difference]: Finished difference Result 826 states and 1345 transitions. [2021-11-07 08:20:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 08:20:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:01,227 INFO L225 Difference]: With dead ends: 826 [2021-11-07 08:20:01,227 INFO L226 Difference]: Without dead ends: 534 [2021-11-07 08:20:01,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-07 08:20:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 350. [2021-11-07 08:20:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.664756446991404) internal successors, (581), 349 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 581 transitions. [2021-11-07 08:20:01,268 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 581 transitions. Word has length 93 [2021-11-07 08:20:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:01,270 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 581 transitions. [2021-11-07 08:20:01,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 581 transitions. [2021-11-07 08:20:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:20:01,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:01,275 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:01,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:01,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:20:01,479 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1638063753, now seen corresponding path program 1 times [2021-11-07 08:20:01,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:20:01,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962433185] [2021-11-07 08:20:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:01,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:20:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:20:01,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:20:01,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 08:20:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:01,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:20:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:01,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:20:02,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:20:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:02,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:02,879 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:20:02,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962433185] [2021-11-07 08:20:02,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962433185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:02,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:02,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:20:02,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634328555] [2021-11-07 08:20:02,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:02,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:20:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:02,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:02,881 INFO L87 Difference]: Start difference. First operand 350 states and 581 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:09,157 INFO L93 Difference]: Finished difference Result 857 states and 1398 transitions. [2021-11-07 08:20:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:09,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 08:20:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:09,161 INFO L225 Difference]: With dead ends: 857 [2021-11-07 08:20:09,162 INFO L226 Difference]: Without dead ends: 528 [2021-11-07 08:20:09,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-07 08:20:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 350. [2021-11-07 08:20:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.659025787965616) internal successors, (579), 349 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 579 transitions. [2021-11-07 08:20:09,178 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 579 transitions. Word has length 94 [2021-11-07 08:20:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:09,178 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 579 transitions. [2021-11-07 08:20:09,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 579 transitions. [2021-11-07 08:20:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:20:09,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:09,181 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:09,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:09,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:20:09,401 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1573447349, now seen corresponding path program 1 times [2021-11-07 08:20:09,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:20:09,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586153879] [2021-11-07 08:20:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:09,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:20:09,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:20:09,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:20:09,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 08:20:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:10,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:20:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:10,108 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:20:10,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:20:10,185 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:20:10,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:20:10,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:20:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:10,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:11,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:20:11,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586153879] [2021-11-07 08:20:11,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586153879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:11,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:11,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:20:11,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743321654] [2021-11-07 08:20:11,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:11,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:20:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:11,093 INFO L87 Difference]: Start difference. First operand 350 states and 579 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2021-11-07 08:20:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:17,264 INFO L93 Difference]: Finished difference Result 775 states and 1264 transitions. [2021-11-07 08:20:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 100 [2021-11-07 08:20:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:17,273 INFO L225 Difference]: With dead ends: 775 [2021-11-07 08:20:17,273 INFO L226 Difference]: Without dead ends: 446 [2021-11-07 08:20:17,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-07 08:20:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2021-11-07 08:20:17,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.6389684813753582) internal successors, (572), 349 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 572 transitions. [2021-11-07 08:20:17,297 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 572 transitions. Word has length 100 [2021-11-07 08:20:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:17,298 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 572 transitions. [2021-11-07 08:20:17,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2021-11-07 08:20:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 572 transitions. [2021-11-07 08:20:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:20:17,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:17,300 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:17,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:17,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:20:17,520 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash -547667807, now seen corresponding path program 1 times [2021-11-07 08:20:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:20:17,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080432771] [2021-11-07 08:20:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:17,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:20:17,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:20:17,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:20:17,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 08:20:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:18,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:20:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:18,300 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:20:18,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:20:18,383 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:20:18,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:20:18,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:20:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:19,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:20:19,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080432771] [2021-11-07 08:20:19,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080432771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:19,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:19,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:20:19,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012958571] [2021-11-07 08:20:19,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:19,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:20:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:19,269 INFO L87 Difference]: Start difference. First operand 350 states and 572 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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) [2021-11-07 08:20:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:26,474 INFO L93 Difference]: Finished difference Result 775 states and 1251 transitions. [2021-11-07 08:20:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:26,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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 100 [2021-11-07 08:20:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:26,479 INFO L225 Difference]: With dead ends: 775 [2021-11-07 08:20:26,479 INFO L226 Difference]: Without dead ends: 446 [2021-11-07 08:20:26,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-07 08:20:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2021-11-07 08:20:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.6189111747851004) internal successors, (565), 349 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 565 transitions. [2021-11-07 08:20:26,495 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 565 transitions. Word has length 100 [2021-11-07 08:20:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:26,496 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 565 transitions. [2021-11-07 08:20:26,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 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) [2021-11-07 08:20:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 565 transitions. [2021-11-07 08:20:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 08:20:26,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:26,498 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:26,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:26,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:20:26,713 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:26,713 INFO L85 PathProgramCache]: Analyzing trace with hash -450450335, now seen corresponding path program 1 times [2021-11-07 08:20:26,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:20:26,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163561297] [2021-11-07 08:20:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:26,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:20:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:20:26,715 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:20:26,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 08:20:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:27,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:20:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:27,471 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:20:27,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:20:27,553 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:20:27,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:20:27,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:20:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:27,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:28,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:20:28,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163561297] [2021-11-07 08:20:28,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163561297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:28,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:28,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:20:28,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169446175] [2021-11-07 08:20:28,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:28,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:20:28,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:28,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:28,408 INFO L87 Difference]: Start difference. First operand 350 states and 565 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2021-11-07 08:20:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:34,179 INFO L93 Difference]: Finished difference Result 775 states and 1238 transitions. [2021-11-07 08:20:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 101 [2021-11-07 08:20:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:34,183 INFO L225 Difference]: With dead ends: 775 [2021-11-07 08:20:34,183 INFO L226 Difference]: Without dead ends: 446 [2021-11-07 08:20:34,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-07 08:20:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2021-11-07 08:20:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.5988538681948423) internal successors, (558), 349 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 558 transitions. [2021-11-07 08:20:34,204 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 558 transitions. Word has length 101 [2021-11-07 08:20:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:34,204 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 558 transitions. [2021-11-07 08:20:34,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2021-11-07 08:20:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 558 transitions. [2021-11-07 08:20:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 08:20:34,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:34,206 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:34,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:34,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:20:34,421 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1357702590, now seen corresponding path program 1 times [2021-11-07 08:20:34,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:20:34,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989103355] [2021-11-07 08:20:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:34,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:20:34,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:20:34,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:20:34,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 08:20:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:20:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:35,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:20:35,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:20:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:35,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:36,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:20:36,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989103355] [2021-11-07 08:20:36,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989103355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:36,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:36,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:20:36,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41845930] [2021-11-07 08:20:36,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:36,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:20:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:36,016 INFO L87 Difference]: Start difference. First operand 350 states and 558 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:45,377 INFO L93 Difference]: Finished difference Result 895 states and 1414 transitions. [2021-11-07 08:20:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 08:20:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:45,381 INFO L225 Difference]: With dead ends: 895 [2021-11-07 08:20:45,381 INFO L226 Difference]: Without dead ends: 566 [2021-11-07 08:20:45,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-07 08:20:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 393. [2021-11-07 08:20:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.6020408163265305) internal successors, (628), 392 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 628 transitions. [2021-11-07 08:20:45,399 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 628 transitions. Word has length 101 [2021-11-07 08:20:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:45,400 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 628 transitions. [2021-11-07 08:20:45,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 628 transitions. [2021-11-07 08:20:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 08:20:45,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:45,402 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:45,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:45,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:20:45,619 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -906277357, now seen corresponding path program 1 times [2021-11-07 08:20:45,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:20:45,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850111224] [2021-11-07 08:20:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:45,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:20:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:20:45,622 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:20:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 08:20:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:20:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:46,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:20:46,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:20:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:46,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:47,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:20:47,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850111224] [2021-11-07 08:20:47,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850111224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:47,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:47,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:20:47,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385376065] [2021-11-07 08:20:47,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:47,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:20:47,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:47,328 INFO L87 Difference]: Start difference. First operand 393 states and 628 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:54,609 INFO L93 Difference]: Finished difference Result 937 states and 1482 transitions. [2021-11-07 08:20:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:20:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 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 102 [2021-11-07 08:20:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:54,618 INFO L225 Difference]: With dead ends: 937 [2021-11-07 08:20:54,618 INFO L226 Difference]: Without dead ends: 561 [2021-11-07 08:20:54,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:20:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-07 08:20:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 395. [2021-11-07 08:20:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.601522842639594) internal successors, (631), 394 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 631 transitions. [2021-11-07 08:20:54,638 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 631 transitions. Word has length 102 [2021-11-07 08:20:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:54,639 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 631 transitions. [2021-11-07 08:20:54,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 631 transitions. [2021-11-07 08:20:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 08:20:54,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:54,641 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:54,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:54,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:20:54,863 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2070926596, now seen corresponding path program 1 times [2021-11-07 08:20:54,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:20:54,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744979218] [2021-11-07 08:20:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:54,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:20:54,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:20:54,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:20:54,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 08:20:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:20:55,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:55,764 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:20:55,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:20:55,831 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:20:55,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:20:55,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:20:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:20:56,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:20:56,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744979218] [2021-11-07 08:20:56,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744979218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:20:56,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:20:56,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:20:56,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509445356] [2021-11-07 08:20:56,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:20:56,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:20:56,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:20:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:20:56,718 INFO L87 Difference]: Start difference. First operand 395 states and 631 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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) [2021-11-07 08:21:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:05,440 INFO L93 Difference]: Finished difference Result 861 states and 1364 transitions. [2021-11-07 08:21:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:21:05,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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 102 [2021-11-07 08:21:05,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:05,444 INFO L225 Difference]: With dead ends: 861 [2021-11-07 08:21:05,444 INFO L226 Difference]: Without dead ends: 487 [2021-11-07 08:21:05,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:21:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-07 08:21:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 395. [2021-11-07 08:21:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.5812182741116751) internal successors, (623), 394 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 623 transitions. [2021-11-07 08:21:05,460 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 623 transitions. Word has length 102 [2021-11-07 08:21:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:05,460 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 623 transitions. [2021-11-07 08:21:05,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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) [2021-11-07 08:21:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 623 transitions. [2021-11-07 08:21:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 08:21:05,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:05,462 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:05,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:05,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:21:05,662 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:05,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1105333732, now seen corresponding path program 1 times [2021-11-07 08:21:05,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:21:05,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448882766] [2021-11-07 08:21:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:05,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:21:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:21:05,665 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:21:05,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 08:21:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:21:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:06,611 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 08:21:06,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:21:06,673 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-07 08:21:06,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-07 08:21:06,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:21:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:21:07,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:21:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:21:07,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:21:07,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448882766] [2021-11-07 08:21:07,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448882766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:21:07,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:21:07,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:21:07,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170691114] [2021-11-07 08:21:07,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:21:07,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:21:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:21:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:21:07,544 INFO L87 Difference]: Start difference. First operand 395 states and 623 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:15,262 INFO L93 Difference]: Finished difference Result 841 states and 1323 transitions. [2021-11-07 08:21:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:21:15,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 08:21:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:15,266 INFO L225 Difference]: With dead ends: 841 [2021-11-07 08:21:15,266 INFO L226 Difference]: Without dead ends: 467 [2021-11-07 08:21:15,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:21:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-07 08:21:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 395. [2021-11-07 08:21:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.5609137055837563) internal successors, (615), 394 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 615 transitions. [2021-11-07 08:21:15,291 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 615 transitions. Word has length 103 [2021-11-07 08:21:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:15,291 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 615 transitions. [2021-11-07 08:21:15,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 615 transitions. [2021-11-07 08:21:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 08:21:15,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:15,294 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:21:15,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:15,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:21:15,509 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash 148936967, now seen corresponding path program 1 times [2021-11-07 08:21:15,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:21:15,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997352707] [2021-11-07 08:21:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:15,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:21:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:21:15,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:21:15,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 08:21:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:21:16,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:16,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:21:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:21:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:16,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:21:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:17,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:21:17,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997352707] [2021-11-07 08:21:17,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997352707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:21:17,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:21:17,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:21:17,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13115875] [2021-11-07 08:21:17,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:21:17,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:21:17,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:21:17,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:21:17,258 INFO L87 Difference]: Start difference. First operand 395 states and 615 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:22,706 INFO L93 Difference]: Finished difference Result 957 states and 1486 transitions. [2021-11-07 08:21:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:21:22,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 08:21:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:22,711 INFO L225 Difference]: With dead ends: 957 [2021-11-07 08:21:22,711 INFO L226 Difference]: Without dead ends: 583 [2021-11-07 08:21:22,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:21:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-07 08:21:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 425. [2021-11-07 08:21:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.5495283018867925) internal successors, (657), 424 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 657 transitions. [2021-11-07 08:21:22,729 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 657 transitions. Word has length 114 [2021-11-07 08:21:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:22,729 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 657 transitions. [2021-11-07 08:21:22,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 657 transitions. [2021-11-07 08:21:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 08:21:22,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:22,739 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:21:22,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:22,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:21:22,949 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 598222737, now seen corresponding path program 1 times [2021-11-07 08:21:22,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:21:22,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400265475] [2021-11-07 08:21:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:22,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:21:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:21:22,951 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:21:22,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 08:21:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:23,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:21:23,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:23,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:21:24,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:21:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:24,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:21:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:24,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:21:24,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400265475] [2021-11-07 08:21:24,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400265475] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:21:24,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:21:24,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:21:24,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036479499] [2021-11-07 08:21:24,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:21:24,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:21:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:21:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:21:24,938 INFO L87 Difference]: Start difference. First operand 425 states and 657 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:32,357 INFO L93 Difference]: Finished difference Result 973 states and 1501 transitions. [2021-11-07 08:21:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:21:32,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-07 08:21:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:32,362 INFO L225 Difference]: With dead ends: 973 [2021-11-07 08:21:32,362 INFO L226 Difference]: Without dead ends: 569 [2021-11-07 08:21:32,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:21:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-07 08:21:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 425. [2021-11-07 08:21:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.5353773584905661) internal successors, (651), 424 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 651 transitions. [2021-11-07 08:21:32,386 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 651 transitions. Word has length 115 [2021-11-07 08:21:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:32,387 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 651 transitions. [2021-11-07 08:21:32,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 651 transitions. [2021-11-07 08:21:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 08:21:32,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:32,389 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:32,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:32,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:21:32,605 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1037652866, now seen corresponding path program 1 times [2021-11-07 08:21:32,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:21:32,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970579123] [2021-11-07 08:21:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:32,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:21:32,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:21:32,607 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:21:32,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 08:21:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:21:33,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:33,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:21:33,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:21:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:33,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:21:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:34,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:21:34,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970579123] [2021-11-07 08:21:34,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970579123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:21:34,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:21:34,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:21:34,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776521803] [2021-11-07 08:21:34,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:21:34,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:21:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:21:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:21:34,538 INFO L87 Difference]: Start difference. First operand 425 states and 651 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:40,421 INFO L93 Difference]: Finished difference Result 1015 states and 1552 transitions. [2021-11-07 08:21:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:21:40,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 08:21:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:40,426 INFO L225 Difference]: With dead ends: 1015 [2021-11-07 08:21:40,426 INFO L226 Difference]: Without dead ends: 611 [2021-11-07 08:21:40,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:21:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-07 08:21:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 453. [2021-11-07 08:21:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5221238938053097) internal successors, (688), 452 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 688 transitions. [2021-11-07 08:21:40,447 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 688 transitions. Word has length 118 [2021-11-07 08:21:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:40,447 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 688 transitions. [2021-11-07 08:21:40,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 688 transitions. [2021-11-07 08:21:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 08:21:40,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:40,450 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:21:40,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:21:40,660 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash -282666580, now seen corresponding path program 1 times [2021-11-07 08:21:40,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:21:40,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224181755] [2021-11-07 08:21:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:40,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:21:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:21:40,662 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:21:40,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 08:21:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:21:41,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:21:41,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:21:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:42,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:21:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:21:42,647 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:21:42,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224181755] [2021-11-07 08:21:42,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224181755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:21:42,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:21:42,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:21:42,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377001232] [2021-11-07 08:21:42,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:21:42,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:21:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:21:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:21:42,649 INFO L87 Difference]: Start difference. First operand 453 states and 688 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:49,488 INFO L93 Difference]: Finished difference Result 1021 states and 1548 transitions. [2021-11-07 08:21:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:21:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 08:21:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:49,492 INFO L225 Difference]: With dead ends: 1021 [2021-11-07 08:21:49,492 INFO L226 Difference]: Without dead ends: 589 [2021-11-07 08:21:49,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:21:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-07 08:21:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 453. [2021-11-07 08:21:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5066371681415929) internal successors, (681), 452 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 681 transitions. [2021-11-07 08:21:49,508 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 681 transitions. Word has length 119 [2021-11-07 08:21:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:49,509 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 681 transitions. [2021-11-07 08:21:49,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 681 transitions. [2021-11-07 08:21:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 08:21:49,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:49,511 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:21:49,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 08:21:49,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:21:49,732 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash 728722381, now seen corresponding path program 1 times [2021-11-07 08:21:49,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:21:49,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236514376] [2021-11-07 08:21:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:49,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:21:49,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:21:49,734 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:21:49,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 08:21:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:21:50,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:50,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:21:50,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:21:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:21:51,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:21:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:21:51,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:21:51,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236514376] [2021-11-07 08:21:51,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236514376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:21:51,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:21:51,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:21:51,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933387316] [2021-11-07 08:21:51,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:21:51,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:21:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:21:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:21:51,859 INFO L87 Difference]: Start difference. First operand 453 states and 681 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:57,706 INFO L93 Difference]: Finished difference Result 1063 states and 1595 transitions. [2021-11-07 08:21:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:21:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 08:21:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:57,710 INFO L225 Difference]: With dead ends: 1063 [2021-11-07 08:21:57,710 INFO L226 Difference]: Without dead ends: 631 [2021-11-07 08:21:57,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:21:57,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-07 08:21:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 488. [2021-11-07 08:21:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.4989733059548254) internal successors, (730), 487 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 730 transitions. [2021-11-07 08:21:57,745 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 730 transitions. Word has length 126 [2021-11-07 08:21:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:57,745 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 730 transitions. [2021-11-07 08:21:57,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 730 transitions. [2021-11-07 08:21:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 08:21:57,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:57,748 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:21:57,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:57,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:21:57,969 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:57,969 INFO L85 PathProgramCache]: Analyzing trace with hash -252796260, now seen corresponding path program 1 times [2021-11-07 08:21:57,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:21:57,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362885312] [2021-11-07 08:21:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:57,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:21:57,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:21:57,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:21:57,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 08:21:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:21:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:58,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:21:59,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:21:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:21:59,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:22:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:22:00,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:22:00,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362885312] [2021-11-07 08:22:00,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362885312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:22:00,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:22:00,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:22:00,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167597780] [2021-11-07 08:22:00,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:22:00,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:22:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:22:00,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:22:00,108 INFO L87 Difference]: Start difference. First operand 488 states and 730 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:06,128 INFO L93 Difference]: Finished difference Result 1088 states and 1626 transitions. [2021-11-07 08:22:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:22:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-07 08:22:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:06,132 INFO L225 Difference]: With dead ends: 1088 [2021-11-07 08:22:06,133 INFO L226 Difference]: Without dead ends: 621 [2021-11-07 08:22:06,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:22:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-07 08:22:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 488. [2021-11-07 08:22:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.4907597535934292) internal successors, (726), 487 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 726 transitions. [2021-11-07 08:22:06,159 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 726 transitions. Word has length 127 [2021-11-07 08:22:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:06,160 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 726 transitions. [2021-11-07 08:22:06,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 726 transitions. [2021-11-07 08:22:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 08:22:06,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:06,162 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:22:06,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-07 08:22:06,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:22:06,389 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:22:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1604311739, now seen corresponding path program 1 times [2021-11-07 08:22:06,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:22:06,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218820315] [2021-11-07 08:22:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:06,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:22:06,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:22:06,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:22:06,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 08:22:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:07,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:22:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:07,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:22:07,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:22:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 08:22:08,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:22:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 08:22:08,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:22:08,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218820315] [2021-11-07 08:22:08,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218820315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:22:08,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:22:08,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:22:08,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965865810] [2021-11-07 08:22:08,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:22:08,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:22:08,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:22:08,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:22:08,727 INFO L87 Difference]: Start difference. First operand 488 states and 726 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:14,466 INFO L93 Difference]: Finished difference Result 1131 states and 1678 transitions. [2021-11-07 08:22:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:22:14,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 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 142 [2021-11-07 08:22:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:14,471 INFO L225 Difference]: With dead ends: 1131 [2021-11-07 08:22:14,471 INFO L226 Difference]: Without dead ends: 664 [2021-11-07 08:22:14,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:22:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-07 08:22:14,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 531. [2021-11-07 08:22:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.4811320754716981) internal successors, (785), 530 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 785 transitions. [2021-11-07 08:22:14,501 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 785 transitions. Word has length 142 [2021-11-07 08:22:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:14,501 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 785 transitions. [2021-11-07 08:22:14,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 785 transitions. [2021-11-07 08:22:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 08:22:14,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:14,504 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:22:14,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 08:22:14,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:22:14,717 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:22:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash 703152116, now seen corresponding path program 1 times [2021-11-07 08:22:14,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:22:14,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591890224] [2021-11-07 08:22:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:14,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:22:14,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:22:14,719 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:22:14,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 08:22:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:22:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:15,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:22:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:22:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 08:22:16,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:22:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 08:22:17,137 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:22:17,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591890224] [2021-11-07 08:22:17,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591890224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:22:17,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:22:17,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:22:17,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215524559] [2021-11-07 08:22:17,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:22:17,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:22:17,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:22:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:22:17,138 INFO L87 Difference]: Start difference. First operand 531 states and 785 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:22,979 INFO L93 Difference]: Finished difference Result 1172 states and 1732 transitions. [2021-11-07 08:22:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:22:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 143 [2021-11-07 08:22:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:22,985 INFO L225 Difference]: With dead ends: 1172 [2021-11-07 08:22:22,985 INFO L226 Difference]: Without dead ends: 646 [2021-11-07 08:22:22,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:22:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-07 08:22:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 523. [2021-11-07 08:22:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4770114942528736) internal successors, (771), 522 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 771 transitions. [2021-11-07 08:22:23,008 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 771 transitions. Word has length 143 [2021-11-07 08:22:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 771 transitions. [2021-11-07 08:22:23,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 771 transitions. [2021-11-07 08:22:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 08:22:23,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:23,011 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:23,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:23,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:22:23,231 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:22:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash -235544469, now seen corresponding path program 1 times [2021-11-07 08:22:23,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:22:23,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060820119] [2021-11-07 08:22:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:23,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:22:23,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:22:23,233 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:22:23,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 08:22:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:22:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:24,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:22:24,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:22:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:22:25,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:22:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:22:25,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:22:25,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060820119] [2021-11-07 08:22:25,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060820119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:22:25,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:22:25,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:22:25,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049470734] [2021-11-07 08:22:25,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:22:25,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:22:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:22:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:22:25,816 INFO L87 Difference]: Start difference. First operand 523 states and 771 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:35,020 INFO L93 Difference]: Finished difference Result 1182 states and 1745 transitions. [2021-11-07 08:22:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:22:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 146 [2021-11-07 08:22:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:35,044 INFO L225 Difference]: With dead ends: 1182 [2021-11-07 08:22:35,044 INFO L226 Difference]: Without dead ends: 680 [2021-11-07 08:22:35,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:22:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-07 08:22:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 549. [2021-11-07 08:22:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.4616788321167884) internal successors, (801), 548 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 801 transitions. [2021-11-07 08:22:35,070 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 801 transitions. Word has length 146 [2021-11-07 08:22:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:35,071 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 801 transitions. [2021-11-07 08:22:35,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 801 transitions. [2021-11-07 08:22:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 08:22:35,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:35,073 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:35,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:35,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:22:35,301 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:22:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:35,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1781639115, now seen corresponding path program 1 times [2021-11-07 08:22:35,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:22:35,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35816516] [2021-11-07 08:22:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:35,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:22:35,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:22:35,303 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:22:35,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 08:22:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:22:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:36,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:22:36,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:22:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:22:37,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:22:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:22:37,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:22:37,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35816516] [2021-11-07 08:22:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35816516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:22:37,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:22:37,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:22:37,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375665658] [2021-11-07 08:22:37,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:22:37,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:22:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:22:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:22:37,783 INFO L87 Difference]: Start difference. First operand 549 states and 801 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:43,517 INFO L93 Difference]: Finished difference Result 1198 states and 1751 transitions. [2021-11-07 08:22:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:22:43,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-07 08:22:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:43,521 INFO L225 Difference]: With dead ends: 1198 [2021-11-07 08:22:43,522 INFO L226 Difference]: Without dead ends: 670 [2021-11-07 08:22:43,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:22:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-07 08:22:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 549. [2021-11-07 08:22:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.4434306569343065) internal successors, (791), 548 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 791 transitions. [2021-11-07 08:22:43,546 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 791 transitions. Word has length 147 [2021-11-07 08:22:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:43,546 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 791 transitions. [2021-11-07 08:22:43,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 791 transitions. [2021-11-07 08:22:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 08:22:43,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:43,549 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-07 08:22:43,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:43,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:22:43,770 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:22:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:43,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1319687323, now seen corresponding path program 1 times [2021-11-07 08:22:43,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:22:43,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478764708] [2021-11-07 08:22:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:43,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:22:43,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:22:43,772 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:22:43,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 08:22:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:22:45,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:22:45,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:22:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:22:45,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:22:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:22:46,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:22:46,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478764708] [2021-11-07 08:22:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478764708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:22:46,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:22:46,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:22:46,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166925359] [2021-11-07 08:22:46,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:22:46,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:22:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:22:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:22:46,565 INFO L87 Difference]: Start difference. First operand 549 states and 791 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:53,442 INFO L93 Difference]: Finished difference Result 1232 states and 1779 transitions. [2021-11-07 08:22:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:22:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 160 [2021-11-07 08:22:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:53,446 INFO L225 Difference]: With dead ends: 1232 [2021-11-07 08:22:53,447 INFO L226 Difference]: Without dead ends: 704 [2021-11-07 08:22:53,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:22:53,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-07 08:22:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 582. [2021-11-07 08:22:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.4337349397590362) internal successors, (833), 581 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 833 transitions. [2021-11-07 08:22:53,473 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 833 transitions. Word has length 160 [2021-11-07 08:22:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:53,473 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 833 transitions. [2021-11-07 08:22:53,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 833 transitions. [2021-11-07 08:22:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 08:22:53,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:53,476 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-07 08:22:53,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:22:53,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:22:53,691 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:22:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:53,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2057654518, now seen corresponding path program 1 times [2021-11-07 08:22:53,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:22:53,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293468357] [2021-11-07 08:22:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:53,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:22:53,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:22:53,693 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:22:53,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 08:22:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:22:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:22:55,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:22:55,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:22:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:22:55,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:22:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:22:56,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:22:56,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293468357] [2021-11-07 08:22:56,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293468357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:22:56,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:22:56,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:22:56,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48825720] [2021-11-07 08:22:56,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:22:56,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:22:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:22:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:22:56,446 INFO L87 Difference]: Start difference. First operand 582 states and 833 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:03,809 INFO L93 Difference]: Finished difference Result 1258 states and 1804 transitions. [2021-11-07 08:23:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:23:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-07 08:23:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:03,815 INFO L225 Difference]: With dead ends: 1258 [2021-11-07 08:23:03,815 INFO L226 Difference]: Without dead ends: 679 [2021-11-07 08:23:03,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:23:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-07 08:23:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 573. [2021-11-07 08:23:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.4213286713286712) internal successors, (813), 572 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 813 transitions. [2021-11-07 08:23:03,851 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 813 transitions. Word has length 161 [2021-11-07 08:23:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:03,851 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 813 transitions. [2021-11-07 08:23:03,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 813 transitions. [2021-11-07 08:23:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 08:23:03,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:03,854 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:23:03,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:04,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:04,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash -683690639, now seen corresponding path program 1 times [2021-11-07 08:23:04,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:04,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024400883] [2021-11-07 08:23:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:04,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:04,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:04,074 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:04,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 08:23:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:23:05,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:05,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:23:05,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:23:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-07 08:23:06,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:23:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-07 08:23:06,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:23:06,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024400883] [2021-11-07 08:23:06,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024400883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:23:06,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:23:06,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:23:06,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275334369] [2021-11-07 08:23:06,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:23:06,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:23:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:23:06,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:23:06,803 INFO L87 Difference]: Start difference. First operand 573 states and 813 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:14,406 INFO L93 Difference]: Finished difference Result 1256 states and 1791 transitions. [2021-11-07 08:23:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:23:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-07 08:23:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:14,413 INFO L225 Difference]: With dead ends: 1256 [2021-11-07 08:23:14,413 INFO L226 Difference]: Without dead ends: 704 [2021-11-07 08:23:14,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:23:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-07 08:23:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 595. [2021-11-07 08:23:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.4023569023569022) internal successors, (833), 594 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 833 transitions. [2021-11-07 08:23:14,437 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 833 transitions. Word has length 164 [2021-11-07 08:23:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:14,437 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 833 transitions. [2021-11-07 08:23:14,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 833 transitions. [2021-11-07 08:23:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 08:23:14,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:14,454 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:23:14,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:14,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:14,673 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash 233484283, now seen corresponding path program 1 times [2021-11-07 08:23:14,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:14,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938232252] [2021-11-07 08:23:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:14,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:14,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:14,676 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:14,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 08:23:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:23:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:16,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:23:16,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:23:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-07 08:23:16,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:23:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-07 08:23:17,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:23:17,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938232252] [2021-11-07 08:23:17,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938232252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:23:17,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:23:17,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:23:17,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921614840] [2021-11-07 08:23:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:23:17,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:23:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:23:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:23:17,581 INFO L87 Difference]: Start difference. First operand 595 states and 833 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:25,843 INFO L93 Difference]: Finished difference Result 1271 states and 1787 transitions. [2021-11-07 08:23:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:23:25,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-07 08:23:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:25,850 INFO L225 Difference]: With dead ends: 1271 [2021-11-07 08:23:25,850 INFO L226 Difference]: Without dead ends: 697 [2021-11-07 08:23:25,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:23:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-11-07 08:23:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 595. [2021-11-07 08:23:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.3821548821548821) internal successors, (821), 594 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 821 transitions. [2021-11-07 08:23:25,878 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 821 transitions. Word has length 165 [2021-11-07 08:23:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:25,878 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 821 transitions. [2021-11-07 08:23:25,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 821 transitions. [2021-11-07 08:23:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-07 08:23:25,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:25,880 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:23:25,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:26,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:26,081 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash 427989883, now seen corresponding path program 1 times [2021-11-07 08:23:26,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:26,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403838631] [2021-11-07 08:23:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:26,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:26,083 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:26,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 08:23:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:23:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:23:28,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:23:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:23:28,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:23:28,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403838631] [2021-11-07 08:23:28,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403838631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:23:28,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:23:28,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 08:23:28,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222368538] [2021-11-07 08:23:28,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:23:28,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:23:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:23:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:23:28,984 INFO L87 Difference]: Start difference. First operand 595 states and 821 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:29,304 INFO L93 Difference]: Finished difference Result 2266 states and 3145 transitions. [2021-11-07 08:23:29,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:23:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 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 167 [2021-11-07 08:23:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:29,315 INFO L225 Difference]: With dead ends: 2266 [2021-11-07 08:23:29,315 INFO L226 Difference]: Without dead ends: 1692 [2021-11-07 08:23:29,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:23:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-07 08:23:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1671. [2021-11-07 08:23:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 1.3844311377245508) internal successors, (2312), 1670 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2312 transitions. [2021-11-07 08:23:29,375 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2312 transitions. Word has length 167 [2021-11-07 08:23:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:29,376 INFO L470 AbstractCegarLoop]: Abstraction has 1671 states and 2312 transitions. [2021-11-07 08:23:29,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2312 transitions. [2021-11-07 08:23:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 08:23:29,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:29,378 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:29,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:29,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:29,593 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1115632087, now seen corresponding path program 1 times [2021-11-07 08:23:29,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:29,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965621429] [2021-11-07 08:23:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:29,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:29,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:29,595 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:29,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 08:23:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:23:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:31,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:23:31,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:23:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-07 08:23:31,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:23:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-07 08:23:32,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:23:32,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965621429] [2021-11-07 08:23:32,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965621429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:23:32,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:23:32,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:23:32,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878120069] [2021-11-07 08:23:32,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:23:32,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:23:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:23:32,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:23:32,574 INFO L87 Difference]: Start difference. First operand 1671 states and 2312 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:41,293 INFO L93 Difference]: Finished difference Result 3687 states and 5106 transitions. [2021-11-07 08:23:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:23:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 168 [2021-11-07 08:23:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:41,310 INFO L225 Difference]: With dead ends: 3687 [2021-11-07 08:23:41,310 INFO L226 Difference]: Without dead ends: 2037 [2021-11-07 08:23:41,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:23:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-11-07 08:23:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1743. [2021-11-07 08:23:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 1.3656716417910448) internal successors, (2379), 1742 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2379 transitions. [2021-11-07 08:23:41,394 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2379 transitions. Word has length 168 [2021-11-07 08:23:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:41,395 INFO L470 AbstractCegarLoop]: Abstraction has 1743 states and 2379 transitions. [2021-11-07 08:23:41,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2379 transitions. [2021-11-07 08:23:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 08:23:41,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:41,398 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:23:41,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:41,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:41,613 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1083141007, now seen corresponding path program 1 times [2021-11-07 08:23:41,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:41,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328659601] [2021-11-07 08:23:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:41,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:41,616 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:41,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 08:23:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:23:43,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-07 08:23:44,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:23:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-07 08:23:45,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:23:45,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328659601] [2021-11-07 08:23:45,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328659601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:23:45,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:23:45,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:23:45,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194964856] [2021-11-07 08:23:45,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:23:45,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:23:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:23:45,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:23:45,062 INFO L87 Difference]: Start difference. First operand 1743 states and 2379 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:45,332 INFO L93 Difference]: Finished difference Result 3990 states and 5455 transitions. [2021-11-07 08:23:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:23:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 168 [2021-11-07 08:23:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:45,343 INFO L225 Difference]: With dead ends: 3990 [2021-11-07 08:23:45,343 INFO L226 Difference]: Without dead ends: 2268 [2021-11-07 08:23:45,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:23:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-11-07 08:23:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2249. [2021-11-07 08:23:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 1.3652135231316727) internal successors, (3069), 2248 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 3069 transitions. [2021-11-07 08:23:45,421 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 3069 transitions. Word has length 168 [2021-11-07 08:23:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:45,421 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 3069 transitions. [2021-11-07 08:23:45,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 3069 transitions. [2021-11-07 08:23:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 08:23:45,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:45,423 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:23:45,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:45,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:45,624 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1280700655, now seen corresponding path program 1 times [2021-11-07 08:23:45,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:45,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053088247] [2021-11-07 08:23:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:45,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:45,628 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 08:23:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:47,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:23:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-07 08:23:48,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:23:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-07 08:23:48,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:23:48,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053088247] [2021-11-07 08:23:48,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053088247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:23:48,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:23:48,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:23:48,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556265514] [2021-11-07 08:23:48,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:23:48,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:23:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:23:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:23:48,666 INFO L87 Difference]: Start difference. First operand 2249 states and 3069 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:48,893 INFO L93 Difference]: Finished difference Result 5048 states and 6892 transitions. [2021-11-07 08:23:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:23:48,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 168 [2021-11-07 08:23:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:48,908 INFO L225 Difference]: With dead ends: 5048 [2021-11-07 08:23:48,909 INFO L226 Difference]: Without dead ends: 2820 [2021-11-07 08:23:48,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:23:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-11-07 08:23:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2801. [2021-11-07 08:23:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2800 states have (on average 1.3628571428571428) internal successors, (3816), 2800 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3816 transitions. [2021-11-07 08:23:49,033 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3816 transitions. Word has length 168 [2021-11-07 08:23:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:49,033 INFO L470 AbstractCegarLoop]: Abstraction has 2801 states and 3816 transitions. [2021-11-07 08:23:49,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3816 transitions. [2021-11-07 08:23:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 08:23:49,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:49,036 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:49,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:49,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:49,236 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash -809196011, now seen corresponding path program 1 times [2021-11-07 08:23:49,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:49,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203230780] [2021-11-07 08:23:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:49,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:49,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:49,239 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:49,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 08:23:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:23:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:51,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:23:51,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-07 08:23:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-07 08:23:51,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:23:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-07 08:23:52,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:23:52,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203230780] [2021-11-07 08:23:52,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203230780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:23:52,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:23:52,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:23:52,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927698336] [2021-11-07 08:23:52,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:23:52,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:23:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:23:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:23:52,525 INFO L87 Difference]: Start difference. First operand 2801 states and 3816 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:58,074 INFO L93 Difference]: Finished difference Result 4892 states and 6670 transitions. [2021-11-07 08:23:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:23:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-07 08:23:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:58,083 INFO L225 Difference]: With dead ends: 4892 [2021-11-07 08:23:58,083 INFO L226 Difference]: Without dead ends: 2077 [2021-11-07 08:23:58,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:23:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-11-07 08:23:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1800. [2021-11-07 08:23:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 1.3451917732073375) internal successors, (2420), 1799 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2420 transitions. [2021-11-07 08:23:58,159 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2420 transitions. Word has length 169 [2021-11-07 08:23:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:58,160 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2420 transitions. [2021-11-07 08:23:58,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2420 transitions. [2021-11-07 08:23:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 08:23:58,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:58,163 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:23:58,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:58,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:23:58,377 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:58,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2075555230, now seen corresponding path program 1 times [2021-11-07 08:23:58,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:23:58,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249465398] [2021-11-07 08:23:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:58,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:23:58,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:23:58,379 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:23:58,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 08:24:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:24:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:24:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:24:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 1902 treesize of output 1899 [2021-11-07 08:24:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2403 treesize of output 2233 [2021-11-07 08:24:01,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:24:01,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2053 treesize of output 1865 [2021-11-07 08:24:04,430 INFO L354 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2021-11-07 08:24:04,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 2150 treesize of output 1991 [2021-11-07 08:24:54,442 WARN L207 SmtUtils]: Spent 49.98 s on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2021-11-07 08:24:54,443 INFO L354 Elim1Store]: treesize reduction 473, result has 21.3 percent of original size [2021-11-07 08:24:54,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 2089 treesize of output 2114 [2021-11-07 08:24:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:10,710 WARN L207 SmtUtils]: Spent 16.23 s on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2021-11-07 08:25:10,711 INFO L354 Elim1Store]: treesize reduction 1044, result has 10.7 percent of original size [2021-11-07 08:25:10,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 2466 treesize of output 2194 [2021-11-07 08:25:10,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2613 treesize of output 2606 [2021-11-07 08:25:13,587 INFO L354 Elim1Store]: treesize reduction 482, result has 9.6 percent of original size [2021-11-07 08:25:13,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 2652 treesize of output 2645 [2021-11-07 08:25:13,919 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:25:13,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7781 treesize of output 7771 [2021-11-07 08:25:14,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7755 treesize of output 7753 [2021-11-07 08:25:14,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:14,666 INFO L244 Elim1Store]: Index analysis took 247 ms [2021-11-07 08:25:14,945 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-11-07 08:25:14,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 602 treesize of output 499 [2021-11-07 08:25:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:18,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 126 [2021-11-07 08:25:18,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:36,945 WARN L207 SmtUtils]: Spent 18.17 s on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-11-07 08:25:36,946 INFO L354 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2021-11-07 08:25:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 200 [2021-11-07 08:25:37,090 INFO L354 Elim1Store]: treesize reduction 23, result has 37.8 percent of original size [2021-11-07 08:25:37,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 83 [2021-11-07 08:25:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:37,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:25:37,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249465398] [2021-11-07 08:25:37,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Unexpected substitution problem. [2021-11-07 08:25:37,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1772255292] [2021-11-07 08:25:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:37,235 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 08:25:37,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/cvc4 [2021-11-07 08:25:37,246 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 08:25:37,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b9c2ed6-f424-4d18-ad9e-e14d1eeebf5a/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 08:25:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:53,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 08:25:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:25:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:53,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2068 treesize of output 2065 [2021-11-07 08:25:53,788 INFO L190 IndexEqualityManager]: detected not equals via solver