./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX --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 fa372dfad40872d8fec1a0f5d039a19d9bc91cfd74858ce24ec80eeafb27f017 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:36:03,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:36:03,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:36:03,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:36:03,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:36:03,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:36:03,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:36:03,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:36:03,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:36:03,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:36:03,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:36:03,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:36:03,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:36:03,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:36:03,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:36:03,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:36:03,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:36:03,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:36:03,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:36:03,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:36:03,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:36:03,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:36:03,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:36:03,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:36:03,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:36:03,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:36:03,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:36:03,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:36:03,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:36:03,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:36:03,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:36:03,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:36:03,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:36:03,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:36:03,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:36:03,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:36:03,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:36:03,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:36:04,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:36:04,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:36:04,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:36:04,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:36:04,047 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:36:04,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:36:04,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:36:04,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:36:04,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:36:04,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:36:04,050 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:36:04,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:36:04,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:36:04,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:36:04,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:36:04,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:36:04,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:36:04,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:36:04,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:36:04,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:36:04,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:36:04,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:36:04,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:36:04,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:36:04,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:36:04,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:36:04,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:36:04,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:36:04,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:36:04,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:36:04,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:36:04,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:36:04,057 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:36:04,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:36:04,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:36:04,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:36:04,059 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_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa372dfad40872d8fec1a0f5d039a19d9bc91cfd74858ce24ec80eeafb27f017 [2021-11-09 08:36:04,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:36:04,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:36:04,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:36:04,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:36:04,392 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:36:04,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c [2021-11-09 08:36:04,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/data/2f0369cd9/dd6755953f3f4de7a356edb7704c6a37/FLAGa5e95bc4f [2021-11-09 08:36:05,096 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:36:05,096 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c [2021-11-09 08:36:05,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/data/2f0369cd9/dd6755953f3f4de7a356edb7704c6a37/FLAGa5e95bc4f [2021-11-09 08:36:05,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/data/2f0369cd9/dd6755953f3f4de7a356edb7704c6a37 [2021-11-09 08:36:05,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:36:05,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:36:05,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:36:05,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:36:05,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:36:05,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:36:05" (1/1) ... [2021-11-09 08:36:05,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc26e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:05, skipping insertion in model container [2021-11-09 08:36:05,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:36:05" (1/1) ... [2021-11-09 08:36:05,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:36:05,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:36:05,895 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_22d65587-774e-4f60-8717-e4303d1b2c36/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c[74696,74709] [2021-11-09 08:36:05,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:36:05,935 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:36:06,133 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_22d65587-774e-4f60-8717-e4303d1b2c36/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-1.c[74696,74709] [2021-11-09 08:36:06,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:36:06,156 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:36:06,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06 WrapperNode [2021-11-09 08:36:06,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:36:06,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:36:06,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:36:06,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:36:06,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:36:06,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:36:06,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:36:06,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:36:06,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:36:06,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:36:06,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:36:06,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:36:06,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (1/1) ... [2021-11-09 08:36:06,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:36:06,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:06,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:36:06,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:36:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:36:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:36:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:36:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:36:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:36:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:36:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:36:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:36:06,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:36:06,718 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 08:36:09,194 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-09 08:36:09,194 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-09 08:36:09,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:36:09,203 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-09 08:36:09,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:09 BoogieIcfgContainer [2021-11-09 08:36:09,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:36:09,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:36:09,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:36:09,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:36:09,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:36:05" (1/3) ... [2021-11-09 08:36:09,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3016cd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:09, skipping insertion in model container [2021-11-09 08:36:09,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:36:06" (2/3) ... [2021-11-09 08:36:09,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3016cd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:09, skipping insertion in model container [2021-11-09 08:36:09,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:09" (3/3) ... [2021-11-09 08:36:09,215 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.08.i.cil-1.c [2021-11-09 08:36:09,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:36:09,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:36:09,286 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:36:09,292 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 [2021-11-09 08:36:09,293 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:36:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 149 states have (on average 1.7181208053691275) internal successors, (256), 150 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:36:09,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:09,337 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, 1] [2021-11-09 08:36:09,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857964, now seen corresponding path program 1 times [2021-11-09 08:36:09,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:09,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121224803] [2021-11-09 08:36:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:09,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:09,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:09,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121224803] [2021-11-09 08:36:09,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121224803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:09,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:09,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:09,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485261925] [2021-11-09 08:36:09,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:09,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:09,873 INFO L87 Difference]: Start difference. First operand has 151 states, 149 states have (on average 1.7181208053691275) internal successors, (256), 150 states have internal predecessors, (256), 0 states have call successors, (0), 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 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:11,293 INFO L93 Difference]: Finished difference Result 327 states and 554 transitions. [2021-11-09 08:36:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-09 08:36:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:11,307 INFO L225 Difference]: With dead ends: 327 [2021-11-09 08:36:11,308 INFO L226 Difference]: Without dead ends: 166 [2021-11-09 08:36:11,311 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 [2021-11-09 08:36:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-09 08:36:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2021-11-09 08:36:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5608108108108107) internal successors, (231), 148 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) [2021-11-09 08:36:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 231 transitions. [2021-11-09 08:36:11,366 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 231 transitions. Word has length 45 [2021-11-09 08:36:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:11,367 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 231 transitions. [2021-11-09 08:36:11,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 231 transitions. [2021-11-09 08:36:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:36:11,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:11,370 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, 1] [2021-11-09 08:36:11,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:36:11,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:11,372 INFO L85 PathProgramCache]: Analyzing trace with hash -31633214, now seen corresponding path program 1 times [2021-11-09 08:36:11,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:11,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005897477] [2021-11-09 08:36:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:11,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:11,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:11,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005897477] [2021-11-09 08:36:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005897477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:11,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:11,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:11,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668577476] [2021-11-09 08:36:11,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:11,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:11,542 INFO L87 Difference]: Start difference. First operand 149 states and 231 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) [2021-11-09 08:36:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:12,614 INFO L93 Difference]: Finished difference Result 294 states and 450 transitions. [2021-11-09 08:36:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:12,614 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 [2021-11-09 08:36:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:12,616 INFO L225 Difference]: With dead ends: 294 [2021-11-09 08:36:12,617 INFO L226 Difference]: Without dead ends: 166 [2021-11-09 08:36:12,618 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 [2021-11-09 08:36:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-09 08:36:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2021-11-09 08:36:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.554054054054054) internal successors, (230), 148 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 230 transitions. [2021-11-09 08:36:12,631 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 230 transitions. Word has length 58 [2021-11-09 08:36:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:12,632 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 230 transitions. [2021-11-09 08:36:12,632 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) [2021-11-09 08:36:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 230 transitions. [2021-11-09 08:36:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:36:12,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:12,635 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, 1] [2021-11-09 08:36:12,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:36:12,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1554525907, now seen corresponding path program 1 times [2021-11-09 08:36:12,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:12,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360387233] [2021-11-09 08:36:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:12,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:12,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:12,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360387233] [2021-11-09 08:36:12,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360387233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:12,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:12,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:12,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564749425] [2021-11-09 08:36:12,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:12,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:12,752 INFO L87 Difference]: Start difference. First operand 149 states and 230 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) [2021-11-09 08:36:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:13,530 INFO L93 Difference]: Finished difference Result 293 states and 448 transitions. [2021-11-09 08:36:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:13,531 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 [2021-11-09 08:36:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:13,532 INFO L225 Difference]: With dead ends: 293 [2021-11-09 08:36:13,532 INFO L226 Difference]: Without dead ends: 165 [2021-11-09 08:36:13,534 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 [2021-11-09 08:36:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-09 08:36:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-11-09 08:36:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5472972972972974) internal successors, (229), 148 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 229 transitions. [2021-11-09 08:36:13,545 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 229 transitions. Word has length 59 [2021-11-09 08:36:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:13,546 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 229 transitions. [2021-11-09 08:36:13,546 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) [2021-11-09 08:36:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 229 transitions. [2021-11-09 08:36:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:36:13,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:13,549 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, 1] [2021-11-09 08:36:13,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:36:13,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash -853537945, now seen corresponding path program 1 times [2021-11-09 08:36:13,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:13,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836956293] [2021-11-09 08:36:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:13,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:13,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:13,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836956293] [2021-11-09 08:36:13,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836956293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:13,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:13,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:13,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582198843] [2021-11-09 08:36:13,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:13,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:13,691 INFO L87 Difference]: Start difference. First operand 149 states and 229 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) [2021-11-09 08:36:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:14,899 INFO L93 Difference]: Finished difference Result 293 states and 447 transitions. [2021-11-09 08:36:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:14,900 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 [2021-11-09 08:36:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:14,901 INFO L225 Difference]: With dead ends: 293 [2021-11-09 08:36:14,901 INFO L226 Difference]: Without dead ends: 165 [2021-11-09 08:36:14,903 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 [2021-11-09 08:36:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-09 08:36:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-11-09 08:36:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5405405405405406) internal successors, (228), 148 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 228 transitions. [2021-11-09 08:36:14,922 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 228 transitions. Word has length 59 [2021-11-09 08:36:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:14,922 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 228 transitions. [2021-11-09 08:36:14,922 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) [2021-11-09 08:36:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 228 transitions. [2021-11-09 08:36:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:36:14,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:14,925 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] [2021-11-09 08:36:14,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:36:14,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1705654722, now seen corresponding path program 1 times [2021-11-09 08:36:14,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:14,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557981671] [2021-11-09 08:36:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:14,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:15,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:15,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557981671] [2021-11-09 08:36:15,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557981671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:15,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:15,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:15,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739731022] [2021-11-09 08:36:15,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:15,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:15,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:15,004 INFO L87 Difference]: Start difference. First operand 149 states and 228 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) [2021-11-09 08:36:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:17,284 INFO L93 Difference]: Finished difference Result 292 states and 445 transitions. [2021-11-09 08:36:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:17,285 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 [2021-11-09 08:36:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:17,287 INFO L225 Difference]: With dead ends: 292 [2021-11-09 08:36:17,287 INFO L226 Difference]: Without dead ends: 164 [2021-11-09 08:36:17,287 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 [2021-11-09 08:36:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-09 08:36:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 149. [2021-11-09 08:36:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5337837837837838) internal successors, (227), 148 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 227 transitions. [2021-11-09 08:36:17,295 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 227 transitions. Word has length 59 [2021-11-09 08:36:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:17,296 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 227 transitions. [2021-11-09 08:36:17,296 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) [2021-11-09 08:36:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 227 transitions. [2021-11-09 08:36:17,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:36:17,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:17,298 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, 1] [2021-11-09 08:36:17,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:36:17,298 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:17,299 INFO L85 PathProgramCache]: Analyzing trace with hash 586092286, now seen corresponding path program 1 times [2021-11-09 08:36:17,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:17,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826859078] [2021-11-09 08:36:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:17,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:17,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:17,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826859078] [2021-11-09 08:36:17,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826859078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:17,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:17,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:17,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162293779] [2021-11-09 08:36:17,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:17,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:17,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:17,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:17,369 INFO L87 Difference]: Start difference. First operand 149 states and 227 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) [2021-11-09 08:36:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:19,577 INFO L93 Difference]: Finished difference Result 290 states and 442 transitions. [2021-11-09 08:36:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:19,578 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 [2021-11-09 08:36:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:19,579 INFO L225 Difference]: With dead ends: 290 [2021-11-09 08:36:19,579 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 08:36:19,580 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 [2021-11-09 08:36:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 08:36:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2021-11-09 08:36:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.527027027027027) internal successors, (226), 148 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 226 transitions. [2021-11-09 08:36:19,587 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 226 transitions. Word has length 59 [2021-11-09 08:36:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:19,589 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 226 transitions. [2021-11-09 08:36:19,590 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) [2021-11-09 08:36:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 226 transitions. [2021-11-09 08:36:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:36:19,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:19,592 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, 1] [2021-11-09 08:36:19,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:36:19,594 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:19,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1428638571, now seen corresponding path program 1 times [2021-11-09 08:36:19,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:19,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860354376] [2021-11-09 08:36:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:19,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:19,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:19,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860354376] [2021-11-09 08:36:19,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860354376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:19,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:19,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:19,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102863099] [2021-11-09 08:36:19,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:19,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:19,716 INFO L87 Difference]: Start difference. First operand 149 states and 226 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) [2021-11-09 08:36:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:21,924 INFO L93 Difference]: Finished difference Result 290 states and 441 transitions. [2021-11-09 08:36:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:21,925 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 [2021-11-09 08:36:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:21,927 INFO L225 Difference]: With dead ends: 290 [2021-11-09 08:36:21,927 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 08:36:21,927 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 [2021-11-09 08:36:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 08:36:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2021-11-09 08:36:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5202702702702702) internal successors, (225), 148 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 225 transitions. [2021-11-09 08:36:21,933 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 225 transitions. Word has length 60 [2021-11-09 08:36:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:21,934 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 225 transitions. [2021-11-09 08:36:21,934 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) [2021-11-09 08:36:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 225 transitions. [2021-11-09 08:36:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:36:21,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:21,935 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, 1] [2021-11-09 08:36:21,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:36:21,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash 426429228, now seen corresponding path program 1 times [2021-11-09 08:36:21,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:21,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239841329] [2021-11-09 08:36:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:21,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:22,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:22,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239841329] [2021-11-09 08:36:22,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239841329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:22,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:22,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:22,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757183556] [2021-11-09 08:36:22,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:22,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:22,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:22,005 INFO L87 Difference]: Start difference. First operand 149 states and 225 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) [2021-11-09 08:36:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:23,318 INFO L93 Difference]: Finished difference Result 290 states and 440 transitions. [2021-11-09 08:36:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:23,319 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 [2021-11-09 08:36:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:23,321 INFO L225 Difference]: With dead ends: 290 [2021-11-09 08:36:23,321 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 08:36:23,321 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 [2021-11-09 08:36:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 08:36:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2021-11-09 08:36:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5135135135135136) internal successors, (224), 148 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 224 transitions. [2021-11-09 08:36:23,327 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 224 transitions. Word has length 61 [2021-11-09 08:36:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:23,328 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 224 transitions. [2021-11-09 08:36:23,328 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) [2021-11-09 08:36:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 224 transitions. [2021-11-09 08:36:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:36:23,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:23,329 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, 1] [2021-11-09 08:36:23,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:36:23,330 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 687473360, now seen corresponding path program 1 times [2021-11-09 08:36:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:23,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278362867] [2021-11-09 08:36:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:23,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:23,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:23,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278362867] [2021-11-09 08:36:23,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278362867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:23,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:23,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:23,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682201484] [2021-11-09 08:36:23,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:23,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:23,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:23,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:23,395 INFO L87 Difference]: Start difference. First operand 149 states and 224 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:24,550 INFO L93 Difference]: Finished difference Result 280 states and 426 transitions. [2021-11-09 08:36:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-09 08:36:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:24,554 INFO L225 Difference]: With dead ends: 280 [2021-11-09 08:36:24,554 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 08:36:24,555 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 [2021-11-09 08:36:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 08:36:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-11-09 08:36:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5067567567567568) internal successors, (223), 148 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 223 transitions. [2021-11-09 08:36:24,560 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 223 transitions. Word has length 62 [2021-11-09 08:36:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:24,561 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 223 transitions. [2021-11-09 08:36:24,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 223 transitions. [2021-11-09 08:36:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:36:24,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:24,562 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, 1] [2021-11-09 08:36:24,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:36:24,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:24,563 INFO L85 PathProgramCache]: Analyzing trace with hash 75599928, now seen corresponding path program 1 times [2021-11-09 08:36:24,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:24,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765084891] [2021-11-09 08:36:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:24,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:24,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:24,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765084891] [2021-11-09 08:36:24,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765084891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:24,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:24,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:24,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082555502] [2021-11-09 08:36:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:24,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:24,637 INFO L87 Difference]: Start difference. First operand 149 states and 223 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:27,001 INFO L93 Difference]: Finished difference Result 320 states and 487 transitions. [2021-11-09 08:36:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:27,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-09 08:36:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:27,003 INFO L225 Difference]: With dead ends: 320 [2021-11-09 08:36:27,003 INFO L226 Difference]: Without dead ends: 192 [2021-11-09 08:36:27,004 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 [2021-11-09 08:36:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-09 08:36:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2021-11-09 08:36:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.535294117647059) internal successors, (261), 170 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) [2021-11-09 08:36:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 261 transitions. [2021-11-09 08:36:27,010 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 261 transitions. Word has length 62 [2021-11-09 08:36:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:27,010 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 261 transitions. [2021-11-09 08:36:27,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 261 transitions. [2021-11-09 08:36:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:36:27,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:27,012 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, 1] [2021-11-09 08:36:27,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:36:27,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1664552990, now seen corresponding path program 1 times [2021-11-09 08:36:27,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:27,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429244853] [2021-11-09 08:36:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:27,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:27,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:27,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429244853] [2021-11-09 08:36:27,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429244853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:27,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:27,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:27,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619703561] [2021-11-09 08:36:27,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:27,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:27,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:27,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:27,078 INFO L87 Difference]: Start difference. First operand 171 states and 261 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) [2021-11-09 08:36:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:28,389 INFO L93 Difference]: Finished difference Result 342 states and 524 transitions. [2021-11-09 08:36:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:28,390 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 [2021-11-09 08:36:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:28,391 INFO L225 Difference]: With dead ends: 342 [2021-11-09 08:36:28,392 INFO L226 Difference]: Without dead ends: 192 [2021-11-09 08:36:28,392 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 [2021-11-09 08:36:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-09 08:36:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2021-11-09 08:36:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5294117647058822) internal successors, (260), 170 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 260 transitions. [2021-11-09 08:36:28,399 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 260 transitions. Word has length 75 [2021-11-09 08:36:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:28,399 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 260 transitions. [2021-11-09 08:36:28,400 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) [2021-11-09 08:36:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 260 transitions. [2021-11-09 08:36:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 08:36:28,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:28,401 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, 1] [2021-11-09 08:36:28,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:36:28,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1698276617, now seen corresponding path program 1 times [2021-11-09 08:36:28,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:28,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513168055] [2021-11-09 08:36:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:28,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:28,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:28,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513168055] [2021-11-09 08:36:28,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513168055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:28,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:28,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:28,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061643491] [2021-11-09 08:36:28,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:28,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:28,459 INFO L87 Difference]: Start difference. First operand 171 states and 260 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) [2021-11-09 08:36:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:29,212 INFO L93 Difference]: Finished difference Result 341 states and 521 transitions. [2021-11-09 08:36:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:29,213 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 [2021-11-09 08:36:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:29,214 INFO L225 Difference]: With dead ends: 341 [2021-11-09 08:36:29,214 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 08:36:29,215 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 [2021-11-09 08:36:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 08:36:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 171. [2021-11-09 08:36:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5235294117647058) internal successors, (259), 170 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 259 transitions. [2021-11-09 08:36:29,221 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 259 transitions. Word has length 76 [2021-11-09 08:36:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:29,221 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 259 transitions. [2021-11-09 08:36:29,222 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) [2021-11-09 08:36:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 259 transitions. [2021-11-09 08:36:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 08:36:29,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:29,223 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, 1] [2021-11-09 08:36:29,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:36:29,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash 188626827, now seen corresponding path program 1 times [2021-11-09 08:36:29,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:29,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204475777] [2021-11-09 08:36:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:29,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:29,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:29,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204475777] [2021-11-09 08:36:29,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204475777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:29,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:29,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:29,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967536861] [2021-11-09 08:36:29,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:29,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:29,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:29,305 INFO L87 Difference]: Start difference. First operand 171 states and 259 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) [2021-11-09 08:36:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:30,472 INFO L93 Difference]: Finished difference Result 341 states and 519 transitions. [2021-11-09 08:36:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:30,473 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 [2021-11-09 08:36:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:30,475 INFO L225 Difference]: With dead ends: 341 [2021-11-09 08:36:30,475 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 08:36:30,475 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 [2021-11-09 08:36:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 08:36:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 171. [2021-11-09 08:36:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5176470588235293) internal successors, (258), 170 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 258 transitions. [2021-11-09 08:36:30,481 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 258 transitions. Word has length 76 [2021-11-09 08:36:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:30,482 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 258 transitions. [2021-11-09 08:36:30,482 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) [2021-11-09 08:36:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 258 transitions. [2021-11-09 08:36:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 08:36:30,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:30,484 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, 1] [2021-11-09 08:36:30,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:36:30,484 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -663489950, now seen corresponding path program 1 times [2021-11-09 08:36:30,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:30,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684237826] [2021-11-09 08:36:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:30,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:30,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:30,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684237826] [2021-11-09 08:36:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684237826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:30,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:30,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:30,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212971185] [2021-11-09 08:36:30,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:30,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:30,544 INFO L87 Difference]: Start difference. First operand 171 states and 258 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) [2021-11-09 08:36:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:31,488 INFO L93 Difference]: Finished difference Result 340 states and 516 transitions. [2021-11-09 08:36:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:31,489 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 [2021-11-09 08:36:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:31,491 INFO L225 Difference]: With dead ends: 340 [2021-11-09 08:36:31,491 INFO L226 Difference]: Without dead ends: 190 [2021-11-09 08:36:31,491 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 [2021-11-09 08:36:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-09 08:36:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 171. [2021-11-09 08:36:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.511764705882353) internal successors, (257), 170 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 257 transitions. [2021-11-09 08:36:31,498 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 257 transitions. Word has length 76 [2021-11-09 08:36:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:31,498 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 257 transitions. [2021-11-09 08:36:31,498 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) [2021-11-09 08:36:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 257 transitions. [2021-11-09 08:36:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 08:36:31,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:31,500 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, 1] [2021-11-09 08:36:31,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:36:31,501 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:31,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:31,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1628257058, now seen corresponding path program 1 times [2021-11-09 08:36:31,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:31,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325721968] [2021-11-09 08:36:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:31,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:31,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:31,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325721968] [2021-11-09 08:36:31,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325721968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:31,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:31,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:31,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073366165] [2021-11-09 08:36:31,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:31,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:31,589 INFO L87 Difference]: Start difference. First operand 171 states and 257 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) [2021-11-09 08:36:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:32,493 INFO L93 Difference]: Finished difference Result 338 states and 512 transitions. [2021-11-09 08:36:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:32,494 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 [2021-11-09 08:36:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:32,495 INFO L225 Difference]: With dead ends: 338 [2021-11-09 08:36:32,495 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 08:36:32,496 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 [2021-11-09 08:36:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 08:36:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2021-11-09 08:36:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5058823529411764) internal successors, (256), 170 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 256 transitions. [2021-11-09 08:36:32,501 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 256 transitions. Word has length 76 [2021-11-09 08:36:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:32,502 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 256 transitions. [2021-11-09 08:36:32,502 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) [2021-11-09 08:36:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 256 transitions. [2021-11-09 08:36:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 08:36:32,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:32,503 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, 1] [2021-11-09 08:36:32,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:36:32,504 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash -623991865, now seen corresponding path program 1 times [2021-11-09 08:36:32,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:32,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210656029] [2021-11-09 08:36:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:32,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:32,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:32,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210656029] [2021-11-09 08:36:32,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210656029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:32,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:32,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:32,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615666211] [2021-11-09 08:36:32,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:32,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:32,562 INFO L87 Difference]: Start difference. First operand 171 states and 256 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) [2021-11-09 08:36:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:34,418 INFO L93 Difference]: Finished difference Result 338 states and 510 transitions. [2021-11-09 08:36:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:34,419 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 [2021-11-09 08:36:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:34,420 INFO L225 Difference]: With dead ends: 338 [2021-11-09 08:36:34,420 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 08:36:34,421 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 [2021-11-09 08:36:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 08:36:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2021-11-09 08:36:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5) internal successors, (255), 170 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 255 transitions. [2021-11-09 08:36:34,427 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 255 transitions. Word has length 77 [2021-11-09 08:36:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:34,428 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 255 transitions. [2021-11-09 08:36:34,428 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) [2021-11-09 08:36:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 255 transitions. [2021-11-09 08:36:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 08:36:34,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:34,429 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, 1] [2021-11-09 08:36:34,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:36:34,430 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1219395152, now seen corresponding path program 1 times [2021-11-09 08:36:34,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:34,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048925372] [2021-11-09 08:36:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:34,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:34,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:34,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048925372] [2021-11-09 08:36:34,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048925372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:34,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:34,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:34,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858514192] [2021-11-09 08:36:34,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:34,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:34,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:34,499 INFO L87 Difference]: Start difference. First operand 171 states and 255 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) [2021-11-09 08:36:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:36,664 INFO L93 Difference]: Finished difference Result 338 states and 508 transitions. [2021-11-09 08:36:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:36,665 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 [2021-11-09 08:36:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:36,666 INFO L225 Difference]: With dead ends: 338 [2021-11-09 08:36:36,666 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 08:36:36,667 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 [2021-11-09 08:36:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 08:36:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2021-11-09 08:36:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.4941176470588236) internal successors, (254), 170 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 254 transitions. [2021-11-09 08:36:36,672 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 254 transitions. Word has length 78 [2021-11-09 08:36:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:36,673 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 254 transitions. [2021-11-09 08:36:36,673 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) [2021-11-09 08:36:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 254 transitions. [2021-11-09 08:36:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 08:36:36,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:36,674 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, 1] [2021-11-09 08:36:36,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:36:36,675 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -500386772, now seen corresponding path program 1 times [2021-11-09 08:36:36,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:36,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106598584] [2021-11-09 08:36:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:36,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:36,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:36,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106598584] [2021-11-09 08:36:36,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106598584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:36,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:36,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:36,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002828530] [2021-11-09 08:36:36,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:36,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:36,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:36,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:36,749 INFO L87 Difference]: Start difference. First operand 171 states and 254 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) [2021-11-09 08:36:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:37,601 INFO L93 Difference]: Finished difference Result 328 states and 493 transitions. [2021-11-09 08:36:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:37,601 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 79 [2021-11-09 08:36:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:37,603 INFO L225 Difference]: With dead ends: 328 [2021-11-09 08:36:37,603 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 08:36:37,603 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 [2021-11-09 08:36:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 08:36:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2021-11-09 08:36:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.488235294117647) internal successors, (253), 170 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 253 transitions. [2021-11-09 08:36:37,609 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 253 transitions. Word has length 79 [2021-11-09 08:36:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:37,609 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 253 transitions. [2021-11-09 08:36:37,609 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) [2021-11-09 08:36:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 253 transitions. [2021-11-09 08:36:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 08:36:37,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:37,610 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] [2021-11-09 08:36:37,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 08:36:37,611 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -379595631, now seen corresponding path program 1 times [2021-11-09 08:36:37,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:37,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614878994] [2021-11-09 08:36:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:37,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:37,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:37,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614878994] [2021-11-09 08:36:37,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614878994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:37,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:37,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:37,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606695259] [2021-11-09 08:36:37,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:37,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:37,702 INFO L87 Difference]: Start difference. First operand 171 states and 253 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) [2021-11-09 08:36:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:40,185 INFO L93 Difference]: Finished difference Result 429 states and 648 transitions. [2021-11-09 08:36:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:40,186 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 [2021-11-09 08:36:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:40,188 INFO L225 Difference]: With dead ends: 429 [2021-11-09 08:36:40,188 INFO L226 Difference]: Without dead ends: 279 [2021-11-09 08:36:40,189 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 [2021-11-09 08:36:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-09 08:36:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 212. [2021-11-09 08:36:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5497630331753554) internal successors, (327), 211 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 327 transitions. [2021-11-09 08:36:40,198 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 327 transitions. Word has length 84 [2021-11-09 08:36:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:40,198 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 327 transitions. [2021-11-09 08:36:40,199 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) [2021-11-09 08:36:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 327 transitions. [2021-11-09 08:36:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 08:36:40,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:40,200 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] [2021-11-09 08:36:40,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:36:40,200 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash 44051091, now seen corresponding path program 1 times [2021-11-09 08:36:40,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:40,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127054251] [2021-11-09 08:36:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:40,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:40,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:40,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127054251] [2021-11-09 08:36:40,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127054251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:40,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:40,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:40,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722391693] [2021-11-09 08:36:40,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:40,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:40,307 INFO L87 Difference]: Start difference. First operand 212 states and 327 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) [2021-11-09 08:36:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:42,074 INFO L93 Difference]: Finished difference Result 452 states and 704 transitions. [2021-11-09 08:36:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:42,074 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 [2021-11-09 08:36:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:42,076 INFO L225 Difference]: With dead ends: 452 [2021-11-09 08:36:42,077 INFO L226 Difference]: Without dead ends: 261 [2021-11-09 08:36:42,077 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 [2021-11-09 08:36:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-09 08:36:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 236. [2021-11-09 08:36:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 235 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 369 transitions. [2021-11-09 08:36:42,086 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 369 transitions. Word has length 84 [2021-11-09 08:36:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:42,088 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 369 transitions. [2021-11-09 08:36:42,088 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) [2021-11-09 08:36:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 369 transitions. [2021-11-09 08:36:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:36:42,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:42,090 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, 1] [2021-11-09 08:36:42,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 08:36:42,091 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -862152842, now seen corresponding path program 1 times [2021-11-09 08:36:42,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:42,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959065077] [2021-11-09 08:36:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:42,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:42,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:42,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959065077] [2021-11-09 08:36:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959065077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:42,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:42,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:42,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219926610] [2021-11-09 08:36:42,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:42,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:42,194 INFO L87 Difference]: Start difference. First operand 236 states and 369 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) [2021-11-09 08:36:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:44,666 INFO L93 Difference]: Finished difference Result 510 states and 794 transitions. [2021-11-09 08:36:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:44,667 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 85 [2021-11-09 08:36:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:44,669 INFO L225 Difference]: With dead ends: 510 [2021-11-09 08:36:44,669 INFO L226 Difference]: Without dead ends: 295 [2021-11-09 08:36:44,669 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 [2021-11-09 08:36:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-09 08:36:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 237. [2021-11-09 08:36:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.5677966101694916) internal successors, (370), 236 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 370 transitions. [2021-11-09 08:36:44,679 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 370 transitions. Word has length 85 [2021-11-09 08:36:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:44,679 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 370 transitions. [2021-11-09 08:36:44,679 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) [2021-11-09 08:36:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 370 transitions. [2021-11-09 08:36:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:36:44,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:44,681 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, 1] [2021-11-09 08:36:44,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:36:44,681 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1187144805, now seen corresponding path program 1 times [2021-11-09 08:36:44,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:44,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035396900] [2021-11-09 08:36:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:44,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:44,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:44,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035396900] [2021-11-09 08:36:44,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035396900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:44,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:44,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:44,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199455535] [2021-11-09 08:36:44,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:44,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:44,756 INFO L87 Difference]: Start difference. First operand 237 states and 370 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) [2021-11-09 08:36:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:47,205 INFO L93 Difference]: Finished difference Result 511 states and 794 transitions. [2021-11-09 08:36:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:47,207 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 [2021-11-09 08:36:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:47,209 INFO L225 Difference]: With dead ends: 511 [2021-11-09 08:36:47,209 INFO L226 Difference]: Without dead ends: 295 [2021-11-09 08:36:47,210 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 [2021-11-09 08:36:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-09 08:36:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 237. [2021-11-09 08:36:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.5635593220338984) internal successors, (369), 236 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 369 transitions. [2021-11-09 08:36:47,218 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 369 transitions. Word has length 97 [2021-11-09 08:36:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:47,219 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 369 transitions. [2021-11-09 08:36:47,219 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) [2021-11-09 08:36:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 369 transitions. [2021-11-09 08:36:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:36:47,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:47,221 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, 1] [2021-11-09 08:36:47,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 08:36:47,221 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2063163811, now seen corresponding path program 1 times [2021-11-09 08:36:47,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:47,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483601043] [2021-11-09 08:36:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:47,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:47,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483601043] [2021-11-09 08:36:47,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483601043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:47,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:47,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:47,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253633140] [2021-11-09 08:36:47,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:47,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:47,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:47,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:47,309 INFO L87 Difference]: Start difference. First operand 237 states and 369 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) [2021-11-09 08:36:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:49,605 INFO L93 Difference]: Finished difference Result 478 states and 745 transitions. [2021-11-09 08:36:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:49,605 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 [2021-11-09 08:36:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:49,607 INFO L225 Difference]: With dead ends: 478 [2021-11-09 08:36:49,607 INFO L226 Difference]: Without dead ends: 262 [2021-11-09 08:36:49,608 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 [2021-11-09 08:36:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-09 08:36:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 237. [2021-11-09 08:36:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.5593220338983051) internal successors, (368), 236 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 368 transitions. [2021-11-09 08:36:49,615 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 368 transitions. Word has length 97 [2021-11-09 08:36:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:49,615 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 368 transitions. [2021-11-09 08:36:49,616 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) [2021-11-09 08:36:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 368 transitions. [2021-11-09 08:36:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:36:49,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:49,617 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, 1] [2021-11-09 08:36:49,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 08:36:49,617 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 681938832, now seen corresponding path program 1 times [2021-11-09 08:36:49,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:49,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064796193] [2021-11-09 08:36:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:49,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:49,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:49,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064796193] [2021-11-09 08:36:49,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064796193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:49,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:49,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:49,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74303008] [2021-11-09 08:36:49,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:49,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:49,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:49,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:49,684 INFO L87 Difference]: Start difference. First operand 237 states and 368 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) [2021-11-09 08:36:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:52,106 INFO L93 Difference]: Finished difference Result 510 states and 789 transitions. [2021-11-09 08:36:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:52,106 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 [2021-11-09 08:36:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:52,108 INFO L225 Difference]: With dead ends: 510 [2021-11-09 08:36:52,108 INFO L226 Difference]: Without dead ends: 294 [2021-11-09 08:36:52,108 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 [2021-11-09 08:36:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-09 08:36:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 237. [2021-11-09 08:36:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.555084745762712) internal successors, (367), 236 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 367 transitions. [2021-11-09 08:36:52,115 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 367 transitions. Word has length 98 [2021-11-09 08:36:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:52,115 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 367 transitions. [2021-11-09 08:36:52,116 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) [2021-11-09 08:36:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 367 transitions. [2021-11-09 08:36:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:36:52,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:52,117 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] [2021-11-09 08:36:52,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 08:36:52,118 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1726125020, now seen corresponding path program 1 times [2021-11-09 08:36:52,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:52,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569600442] [2021-11-09 08:36:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:52,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 08:36:52,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:52,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569600442] [2021-11-09 08:36:52,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569600442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:52,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:52,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:36:52,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772717375] [2021-11-09 08:36:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:36:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:36:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:52,215 INFO L87 Difference]: Start difference. First operand 237 states and 367 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2021-11-09 08:36:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:55,357 INFO L93 Difference]: Finished difference Result 474 states and 739 transitions. [2021-11-09 08:36:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:36:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 98 [2021-11-09 08:36:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:55,359 INFO L225 Difference]: With dead ends: 474 [2021-11-09 08:36:55,359 INFO L226 Difference]: Without dead ends: 258 [2021-11-09 08:36:55,359 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 [2021-11-09 08:36:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-09 08:36:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-11-09 08:36:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.53515625) internal successors, (393), 256 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) [2021-11-09 08:36:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 393 transitions. [2021-11-09 08:36:55,368 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 393 transitions. Word has length 98 [2021-11-09 08:36:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:55,369 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 393 transitions. [2021-11-09 08:36:55,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2021-11-09 08:36:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 393 transitions. [2021-11-09 08:36:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:36:55,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:55,370 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, 1] [2021-11-09 08:36:55,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 08:36:55,371 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1716725499, now seen corresponding path program 1 times [2021-11-09 08:36:55,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:55,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960281183] [2021-11-09 08:36:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:55,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:55,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:55,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960281183] [2021-11-09 08:36:55,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960281183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:55,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:55,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:55,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762695721] [2021-11-09 08:36:55,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:55,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:55,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:55,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:55,439 INFO L87 Difference]: Start difference. First operand 257 states and 393 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) [2021-11-09 08:36:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:56,863 INFO L93 Difference]: Finished difference Result 549 states and 837 transitions. [2021-11-09 08:36:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:56,864 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 [2021-11-09 08:36:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:56,866 INFO L225 Difference]: With dead ends: 549 [2021-11-09 08:36:56,866 INFO L226 Difference]: Without dead ends: 313 [2021-11-09 08:36:56,866 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 [2021-11-09 08:36:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-09 08:36:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 257. [2021-11-09 08:36:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.53125) internal successors, (392), 256 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) [2021-11-09 08:36:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 392 transitions. [2021-11-09 08:36:56,883 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 392 transitions. Word has length 98 [2021-11-09 08:36:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:56,883 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 392 transitions. [2021-11-09 08:36:56,883 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) [2021-11-09 08:36:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 392 transitions. [2021-11-09 08:36:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:36:56,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:56,885 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, 1] [2021-11-09 08:36:56,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 08:36:56,885 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash -286494789, now seen corresponding path program 1 times [2021-11-09 08:36:56,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:56,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819496166] [2021-11-09 08:36:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:56,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:56,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:56,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819496166] [2021-11-09 08:36:56,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819496166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:56,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:56,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:56,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809256672] [2021-11-09 08:36:56,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:56,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:56,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:56,960 INFO L87 Difference]: Start difference. First operand 257 states and 392 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) [2021-11-09 08:36:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:59,311 INFO L93 Difference]: Finished difference Result 547 states and 833 transitions. [2021-11-09 08:36:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:59,312 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 [2021-11-09 08:36:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:59,313 INFO L225 Difference]: With dead ends: 547 [2021-11-09 08:36:59,314 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 08:36:59,314 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 [2021-11-09 08:36:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 08:36:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 257. [2021-11-09 08:36:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.52734375) internal successors, (391), 256 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) [2021-11-09 08:36:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 391 transitions. [2021-11-09 08:36:59,323 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 391 transitions. Word has length 98 [2021-11-09 08:36:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:59,324 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 391 transitions. [2021-11-09 08:36:59,324 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) [2021-11-09 08:36:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 391 transitions. [2021-11-09 08:36:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:36:59,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:59,326 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, 1] [2021-11-09 08:36:59,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 08:36:59,326 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1191456387, now seen corresponding path program 1 times [2021-11-09 08:36:59,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:59,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737146190] [2021-11-09 08:36:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:59,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:36:59,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:59,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737146190] [2021-11-09 08:36:59,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737146190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:59,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:36:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825841357] [2021-11-09 08:36:59,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:59,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:59,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:59,390 INFO L87 Difference]: Start difference. First operand 257 states and 391 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) [2021-11-09 08:37:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:00,136 INFO L93 Difference]: Finished difference Result 516 states and 786 transitions. [2021-11-09 08:37:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:00,137 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 [2021-11-09 08:37:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:00,139 INFO L225 Difference]: With dead ends: 516 [2021-11-09 08:37:00,139 INFO L226 Difference]: Without dead ends: 280 [2021-11-09 08:37:00,139 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 [2021-11-09 08:37:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-09 08:37:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 257. [2021-11-09 08:37:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.5234375) internal successors, (390), 256 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) [2021-11-09 08:37:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 390 transitions. [2021-11-09 08:37:00,149 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 390 transitions. Word has length 98 [2021-11-09 08:37:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:00,149 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 390 transitions. [2021-11-09 08:37:00,150 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) [2021-11-09 08:37:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 390 transitions. [2021-11-09 08:37:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:37:00,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:00,151 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, 1] [2021-11-09 08:37:00,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-09 08:37:00,151 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:00,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1100290621, now seen corresponding path program 1 times [2021-11-09 08:37:00,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:00,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963046365] [2021-11-09 08:37:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:00,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:00,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:00,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963046365] [2021-11-09 08:37:00,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963046365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:00,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:00,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:00,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715232844] [2021-11-09 08:37:00,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:00,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:00,228 INFO L87 Difference]: Start difference. First operand 257 states and 390 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) [2021-11-09 08:37:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:01,183 INFO L93 Difference]: Finished difference Result 514 states and 782 transitions. [2021-11-09 08:37:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:01,184 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 [2021-11-09 08:37:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:01,185 INFO L225 Difference]: With dead ends: 514 [2021-11-09 08:37:01,185 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 08:37:01,186 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 [2021-11-09 08:37:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 08:37:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2021-11-09 08:37:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.51953125) internal successors, (389), 256 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) [2021-11-09 08:37:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 389 transitions. [2021-11-09 08:37:01,195 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 389 transitions. Word has length 98 [2021-11-09 08:37:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:01,195 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 389 transitions. [2021-11-09 08:37:01,195 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) [2021-11-09 08:37:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 389 transitions. [2021-11-09 08:37:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 08:37:01,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:01,197 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, 1] [2021-11-09 08:37:01,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-09 08:37:01,197 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash 810602497, now seen corresponding path program 1 times [2021-11-09 08:37:01,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:01,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134442869] [2021-11-09 08:37:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:01,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:01,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:01,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134442869] [2021-11-09 08:37:01,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134442869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:01,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:01,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:01,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514780700] [2021-11-09 08:37:01,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:01,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:01,289 INFO L87 Difference]: Start difference. First operand 257 states and 389 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) [2021-11-09 08:37:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:02,777 INFO L93 Difference]: Finished difference Result 547 states and 827 transitions. [2021-11-09 08:37:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:02,778 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 [2021-11-09 08:37:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:02,780 INFO L225 Difference]: With dead ends: 547 [2021-11-09 08:37:02,780 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 08:37:02,781 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 [2021-11-09 08:37:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 08:37:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 257. [2021-11-09 08:37:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.515625) internal successors, (388), 256 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) [2021-11-09 08:37:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 388 transitions. [2021-11-09 08:37:02,790 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 388 transitions. Word has length 99 [2021-11-09 08:37:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:02,790 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 388 transitions. [2021-11-09 08:37:02,791 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) [2021-11-09 08:37:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 388 transitions. [2021-11-09 08:37:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 08:37:02,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:02,792 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, 1] [2021-11-09 08:37:02,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-09 08:37:02,793 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash 851277247, now seen corresponding path program 1 times [2021-11-09 08:37:02,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:02,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560347173] [2021-11-09 08:37:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:02,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:02,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:02,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560347173] [2021-11-09 08:37:02,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560347173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:02,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:02,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:02,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061112775] [2021-11-09 08:37:02,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:02,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:02,871 INFO L87 Difference]: Start difference. First operand 257 states and 388 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) [2021-11-09 08:37:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:04,416 INFO L93 Difference]: Finished difference Result 514 states and 778 transitions. [2021-11-09 08:37:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:04,417 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 [2021-11-09 08:37:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:04,419 INFO L225 Difference]: With dead ends: 514 [2021-11-09 08:37:04,419 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 08:37:04,420 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 [2021-11-09 08:37:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 08:37:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2021-11-09 08:37:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.51171875) internal successors, (387), 256 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 387 transitions. [2021-11-09 08:37:04,430 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 387 transitions. Word has length 99 [2021-11-09 08:37:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:04,430 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 387 transitions. [2021-11-09 08:37:04,431 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) [2021-11-09 08:37:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 387 transitions. [2021-11-09 08:37:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 08:37:04,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:04,432 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, 1] [2021-11-09 08:37:04,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-09 08:37:04,433 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1213530345, now seen corresponding path program 1 times [2021-11-09 08:37:04,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:04,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168691355] [2021-11-09 08:37:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:04,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:04,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:04,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168691355] [2021-11-09 08:37:04,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168691355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:04,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:04,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:04,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97310302] [2021-11-09 08:37:04,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:04,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:04,529 INFO L87 Difference]: Start difference. First operand 257 states and 387 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) [2021-11-09 08:37:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:06,602 INFO L93 Difference]: Finished difference Result 547 states and 823 transitions. [2021-11-09 08:37:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:06,603 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 [2021-11-09 08:37:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:06,605 INFO L225 Difference]: With dead ends: 547 [2021-11-09 08:37:06,605 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 08:37:06,606 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 [2021-11-09 08:37:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 08:37:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 257. [2021-11-09 08:37:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.5078125) internal successors, (386), 256 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 386 transitions. [2021-11-09 08:37:06,617 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 386 transitions. Word has length 100 [2021-11-09 08:37:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:06,618 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 386 transitions. [2021-11-09 08:37:06,618 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) [2021-11-09 08:37:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 386 transitions. [2021-11-09 08:37:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 08:37:06,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:06,620 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, 1] [2021-11-09 08:37:06,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-09 08:37:06,620 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 47386905, now seen corresponding path program 1 times [2021-11-09 08:37:06,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:06,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23585070] [2021-11-09 08:37:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:06,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:06,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:06,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23585070] [2021-11-09 08:37:06,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23585070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:06,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:06,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:06,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718473992] [2021-11-09 08:37:06,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:06,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:06,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:06,696 INFO L87 Difference]: Start difference. First operand 257 states and 386 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) [2021-11-09 08:37:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:08,034 INFO L93 Difference]: Finished difference Result 514 states and 774 transitions. [2021-11-09 08:37:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:08,034 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 [2021-11-09 08:37:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:08,036 INFO L225 Difference]: With dead ends: 514 [2021-11-09 08:37:08,037 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 08:37:08,040 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 [2021-11-09 08:37:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 08:37:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2021-11-09 08:37:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.50390625) internal successors, (385), 256 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 385 transitions. [2021-11-09 08:37:08,050 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 385 transitions. Word has length 100 [2021-11-09 08:37:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:08,050 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 385 transitions. [2021-11-09 08:37:08,051 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) [2021-11-09 08:37:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 385 transitions. [2021-11-09 08:37:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 08:37:08,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:08,052 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, 1] [2021-11-09 08:37:08,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-09 08:37:08,053 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:08,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1015798812, now seen corresponding path program 1 times [2021-11-09 08:37:08,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:08,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506175019] [2021-11-09 08:37:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:08,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:08,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:08,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506175019] [2021-11-09 08:37:08,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506175019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:08,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:08,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:08,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321289707] [2021-11-09 08:37:08,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:08,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:08,144 INFO L87 Difference]: Start difference. First operand 257 states and 385 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) [2021-11-09 08:37:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:10,577 INFO L93 Difference]: Finished difference Result 547 states and 819 transitions. [2021-11-09 08:37:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:10,578 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 [2021-11-09 08:37:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:10,580 INFO L225 Difference]: With dead ends: 547 [2021-11-09 08:37:10,580 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 08:37:10,581 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 [2021-11-09 08:37:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 08:37:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 257. [2021-11-09 08:37:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.5) internal successors, (384), 256 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 384 transitions. [2021-11-09 08:37:10,590 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 384 transitions. Word has length 101 [2021-11-09 08:37:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:10,590 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 384 transitions. [2021-11-09 08:37:10,591 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) [2021-11-09 08:37:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 384 transitions. [2021-11-09 08:37:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 08:37:10,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:10,592 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, 1] [2021-11-09 08:37:10,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-09 08:37:10,593 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1449527898, now seen corresponding path program 1 times [2021-11-09 08:37:10,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:10,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792799130] [2021-11-09 08:37:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:10,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:10,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:10,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792799130] [2021-11-09 08:37:10,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792799130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:10,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006172721] [2021-11-09 08:37:10,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:10,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:10,662 INFO L87 Difference]: Start difference. First operand 257 states and 384 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) [2021-11-09 08:37:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:12,958 INFO L93 Difference]: Finished difference Result 514 states and 770 transitions. [2021-11-09 08:37:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:12,959 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 [2021-11-09 08:37:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:12,960 INFO L225 Difference]: With dead ends: 514 [2021-11-09 08:37:12,960 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 08:37:12,961 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 [2021-11-09 08:37:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 08:37:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2021-11-09 08:37:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.49609375) internal successors, (383), 256 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 383 transitions. [2021-11-09 08:37:12,969 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 383 transitions. Word has length 101 [2021-11-09 08:37:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:12,969 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 383 transitions. [2021-11-09 08:37:12,970 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) [2021-11-09 08:37:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 383 transitions. [2021-11-09 08:37:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 08:37:12,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:12,971 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, 1] [2021-11-09 08:37:12,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-09 08:37:12,971 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1958463762, now seen corresponding path program 1 times [2021-11-09 08:37:12,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:12,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203329180] [2021-11-09 08:37:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:12,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:13,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:13,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203329180] [2021-11-09 08:37:13,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203329180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:13,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:13,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:13,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665596136] [2021-11-09 08:37:13,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:13,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:13,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:13,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:13,036 INFO L87 Difference]: Start difference. First operand 257 states and 383 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:14,843 INFO L93 Difference]: Finished difference Result 537 states and 803 transitions. [2021-11-09 08:37:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2021-11-09 08:37:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:14,847 INFO L225 Difference]: With dead ends: 537 [2021-11-09 08:37:14,847 INFO L226 Difference]: Without dead ends: 301 [2021-11-09 08:37:14,847 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 [2021-11-09 08:37:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-09 08:37:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 257. [2021-11-09 08:37:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.4921875) internal successors, (382), 256 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 382 transitions. [2021-11-09 08:37:14,857 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 382 transitions. Word has length 102 [2021-11-09 08:37:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:14,857 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 382 transitions. [2021-11-09 08:37:14,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 382 transitions. [2021-11-09 08:37:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 08:37:14,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:14,859 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, 1] [2021-11-09 08:37:14,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-09 08:37:14,859 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:14,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1775803756, now seen corresponding path program 1 times [2021-11-09 08:37:14,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:14,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563447666] [2021-11-09 08:37:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:14,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:14,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:14,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563447666] [2021-11-09 08:37:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563447666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:14,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:14,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:14,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725808341] [2021-11-09 08:37:14,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:14,926 INFO L87 Difference]: Start difference. First operand 257 states and 382 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:16,896 INFO L93 Difference]: Finished difference Result 504 states and 754 transitions. [2021-11-09 08:37:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:16,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2021-11-09 08:37:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:16,897 INFO L225 Difference]: With dead ends: 504 [2021-11-09 08:37:16,898 INFO L226 Difference]: Without dead ends: 268 [2021-11-09 08:37:16,898 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 [2021-11-09 08:37:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-09 08:37:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 257. [2021-11-09 08:37:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.48828125) internal successors, (381), 256 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 381 transitions. [2021-11-09 08:37:16,907 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 381 transitions. Word has length 102 [2021-11-09 08:37:16,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:16,908 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 381 transitions. [2021-11-09 08:37:16,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 381 transitions. [2021-11-09 08:37:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:37:16,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:16,909 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, 1] [2021-11-09 08:37:16,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-09 08:37:16,910 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1610550370, now seen corresponding path program 1 times [2021-11-09 08:37:16,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:16,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505924905] [2021-11-09 08:37:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:16,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:37:16,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:16,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505924905] [2021-11-09 08:37:16,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505924905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:16,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:16,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:16,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284831094] [2021-11-09 08:37:16,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:16,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:16,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:16,980 INFO L87 Difference]: Start difference. First operand 257 states and 381 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) [2021-11-09 08:37:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:18,952 INFO L93 Difference]: Finished difference Result 537 states and 799 transitions. [2021-11-09 08:37:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:18,953 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 106 [2021-11-09 08:37:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:18,955 INFO L225 Difference]: With dead ends: 537 [2021-11-09 08:37:18,955 INFO L226 Difference]: Without dead ends: 301 [2021-11-09 08:37:18,956 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 [2021-11-09 08:37:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-09 08:37:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 257. [2021-11-09 08:37:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.484375) internal successors, (380), 256 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 380 transitions. [2021-11-09 08:37:18,966 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 380 transitions. Word has length 106 [2021-11-09 08:37:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:18,966 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 380 transitions. [2021-11-09 08:37:18,966 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) [2021-11-09 08:37:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 380 transitions. [2021-11-09 08:37:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:37:18,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:18,968 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, 1] [2021-11-09 08:37:18,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-09 08:37:18,968 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2027946976, now seen corresponding path program 1 times [2021-11-09 08:37:18,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:18,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285572524] [2021-11-09 08:37:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:18,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:37:19,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:19,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285572524] [2021-11-09 08:37:19,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285572524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:19,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:19,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:19,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760932386] [2021-11-09 08:37:19,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:19,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:19,044 INFO L87 Difference]: Start difference. First operand 257 states and 380 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-11-09 08:37:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:19,091 INFO L93 Difference]: Finished difference Result 723 states and 1083 transitions. [2021-11-09 08:37:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 106 [2021-11-09 08:37:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:19,095 INFO L225 Difference]: With dead ends: 723 [2021-11-09 08:37:19,095 INFO L226 Difference]: Without dead ends: 487 [2021-11-09 08:37:19,096 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 [2021-11-09 08:37:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-09 08:37:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 487. [2021-11-09 08:37:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.4794238683127572) internal successors, (719), 486 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 719 transitions. [2021-11-09 08:37:19,112 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 719 transitions. Word has length 106 [2021-11-09 08:37:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:19,112 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 719 transitions. [2021-11-09 08:37:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-11-09 08:37:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 719 transitions. [2021-11-09 08:37:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:37:19,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:19,116 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, 1] [2021-11-09 08:37:19,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-09 08:37:19,117 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 580840482, now seen corresponding path program 1 times [2021-11-09 08:37:19,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:19,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429006735] [2021-11-09 08:37:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:19,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-09 08:37:19,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:19,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429006735] [2021-11-09 08:37:19,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429006735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:19,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:19,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:19,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707843313] [2021-11-09 08:37:19,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:19,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:19,173 INFO L87 Difference]: Start difference. First operand 487 states and 719 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:19,211 INFO L93 Difference]: Finished difference Result 980 states and 1450 transitions. [2021-11-09 08:37:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:37:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:19,215 INFO L225 Difference]: With dead ends: 980 [2021-11-09 08:37:19,215 INFO L226 Difference]: Without dead ends: 514 [2021-11-09 08:37:19,216 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 [2021-11-09 08:37:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-09 08:37:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-09 08:37:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.469785575048733) internal successors, (754), 513 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 754 transitions. [2021-11-09 08:37:19,234 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 754 transitions. Word has length 106 [2021-11-09 08:37:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:19,234 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 754 transitions. [2021-11-09 08:37:19,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 754 transitions. [2021-11-09 08:37:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 08:37:19,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:19,236 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, 1] [2021-11-09 08:37:19,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-09 08:37:19,237 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1837643996, now seen corresponding path program 1 times [2021-11-09 08:37:19,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:19,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585888149] [2021-11-09 08:37:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:19,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-09 08:37:19,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:19,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585888149] [2021-11-09 08:37:19,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585888149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:19,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:19,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:19,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817170743] [2021-11-09 08:37:19,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:19,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:19,308 INFO L87 Difference]: Start difference. First operand 514 states and 754 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:19,340 INFO L93 Difference]: Finished difference Result 1009 states and 1486 transitions. [2021-11-09 08:37:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 08:37:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:19,344 INFO L225 Difference]: With dead ends: 1009 [2021-11-09 08:37:19,344 INFO L226 Difference]: Without dead ends: 516 [2021-11-09 08:37:19,345 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 [2021-11-09 08:37:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-09 08:37:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-09 08:37:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.4679611650485438) internal successors, (756), 515 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 756 transitions. [2021-11-09 08:37:19,380 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 756 transitions. Word has length 106 [2021-11-09 08:37:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:19,381 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 756 transitions. [2021-11-09 08:37:19,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 756 transitions. [2021-11-09 08:37:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 08:37:19,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:19,384 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] [2021-11-09 08:37:19,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-09 08:37:19,385 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash -432489326, now seen corresponding path program 1 times [2021-11-09 08:37:19,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:19,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758929860] [2021-11-09 08:37:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:19,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 08:37:19,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:19,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758929860] [2021-11-09 08:37:19,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758929860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:19,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:19,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:19,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712265768] [2021-11-09 08:37:19,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:19,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:19,480 INFO L87 Difference]: Start difference. First operand 516 states and 756 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2021-11-09 08:37:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:19,540 INFO L93 Difference]: Finished difference Result 1243 states and 1839 transitions. [2021-11-09 08:37:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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 [2021-11-09 08:37:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:19,545 INFO L225 Difference]: With dead ends: 1243 [2021-11-09 08:37:19,545 INFO L226 Difference]: Without dead ends: 750 [2021-11-09 08:37:19,546 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 [2021-11-09 08:37:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-11-09 08:37:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-11-09 08:37:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.472630173564753) internal successors, (1103), 749 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1103 transitions. [2021-11-09 08:37:19,573 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1103 transitions. Word has length 125 [2021-11-09 08:37:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:19,574 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1103 transitions. [2021-11-09 08:37:19,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2021-11-09 08:37:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1103 transitions. [2021-11-09 08:37:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 08:37:19,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:19,578 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] [2021-11-09 08:37:19,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-09 08:37:19,578 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1600024391, now seen corresponding path program 1 times [2021-11-09 08:37:19,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:19,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781972056] [2021-11-09 08:37:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:19,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 08:37:19,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:19,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781972056] [2021-11-09 08:37:19,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781972056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:19,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:19,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:19,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113497486] [2021-11-09 08:37:19,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:19,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:19,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:19,665 INFO L87 Difference]: Start difference. First operand 750 states and 1103 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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) [2021-11-09 08:37:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:19,728 INFO L93 Difference]: Finished difference Result 1705 states and 2524 transitions. [2021-11-09 08:37:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 168 [2021-11-09 08:37:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:19,734 INFO L225 Difference]: With dead ends: 1705 [2021-11-09 08:37:19,735 INFO L226 Difference]: Without dead ends: 978 [2021-11-09 08:37:19,736 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 [2021-11-09 08:37:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-09 08:37:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 978. [2021-11-09 08:37:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.472876151484135) internal successors, (1439), 977 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1439 transitions. [2021-11-09 08:37:19,770 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1439 transitions. Word has length 168 [2021-11-09 08:37:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:19,770 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1439 transitions. [2021-11-09 08:37:19,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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) [2021-11-09 08:37:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1439 transitions. [2021-11-09 08:37:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-09 08:37:19,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:19,774 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-09 08:37:19,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-09 08:37:19,774 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash -61112313, now seen corresponding path program 1 times [2021-11-09 08:37:19,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:19,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044666253] [2021-11-09 08:37:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:19,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-09 08:37:19,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:19,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044666253] [2021-11-09 08:37:19,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044666253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:19,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:19,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:19,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032579306] [2021-11-09 08:37:19,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:19,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:19,890 INFO L87 Difference]: Start difference. First operand 978 states and 1439 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:19,963 INFO L93 Difference]: Finished difference Result 2167 states and 3205 transitions. [2021-11-09 08:37:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:19,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-09 08:37:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:19,971 INFO L225 Difference]: With dead ends: 2167 [2021-11-09 08:37:19,971 INFO L226 Difference]: Without dead ends: 1212 [2021-11-09 08:37:19,973 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 [2021-11-09 08:37:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-11-09 08:37:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1212. [2021-11-09 08:37:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.476465730800991) internal successors, (1788), 1211 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1788 transitions. [2021-11-09 08:37:20,014 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1788 transitions. Word has length 207 [2021-11-09 08:37:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:20,015 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1788 transitions. [2021-11-09 08:37:20,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1788 transitions. [2021-11-09 08:37:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-09 08:37:20,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:20,019 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-09 08:37:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-09 08:37:20,020 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash 521412749, now seen corresponding path program 1 times [2021-11-09 08:37:20,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:20,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393922456] [2021-11-09 08:37:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:20,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-09 08:37:20,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:20,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393922456] [2021-11-09 08:37:20,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393922456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:20,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:20,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:20,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636142978] [2021-11-09 08:37:20,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:20,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:20,121 INFO L87 Difference]: Start difference. First operand 1212 states and 1788 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2021-11-09 08:37:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:20,203 INFO L93 Difference]: Finished difference Result 2635 states and 3903 transitions. [2021-11-09 08:37:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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 249 [2021-11-09 08:37:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:20,212 INFO L225 Difference]: With dead ends: 2635 [2021-11-09 08:37:20,212 INFO L226 Difference]: Without dead ends: 1446 [2021-11-09 08:37:20,213 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 [2021-11-09 08:37:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-11-09 08:37:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1446. [2021-11-09 08:37:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 1.4795847750865052) internal successors, (2138), 1445 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2138 transitions. [2021-11-09 08:37:20,260 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2138 transitions. Word has length 249 [2021-11-09 08:37:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:20,260 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 2138 transitions. [2021-11-09 08:37:20,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2021-11-09 08:37:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2138 transitions. [2021-11-09 08:37:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-09 08:37:20,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:20,265 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2021-11-09 08:37:20,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-09 08:37:20,266 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:20,267 INFO L85 PathProgramCache]: Analyzing trace with hash -963563067, now seen corresponding path program 1 times [2021-11-09 08:37:20,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:20,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938675632] [2021-11-09 08:37:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:20,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-09 08:37:20,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:20,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938675632] [2021-11-09 08:37:20,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938675632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:20,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:20,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:20,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073129348] [2021-11-09 08:37:20,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:20,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:20,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:20,392 INFO L87 Difference]: Start difference. First operand 1446 states and 2138 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:22,948 INFO L93 Difference]: Finished difference Result 3486 states and 5184 transitions. [2021-11-09 08:37:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-11-09 08:37:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:22,960 INFO L225 Difference]: With dead ends: 3486 [2021-11-09 08:37:22,961 INFO L226 Difference]: Without dead ends: 2063 [2021-11-09 08:37:22,963 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 [2021-11-09 08:37:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-11-09 08:37:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1692. [2021-11-09 08:37:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 1.530455351862803) internal successors, (2588), 1691 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2588 transitions. [2021-11-09 08:37:23,023 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2588 transitions. Word has length 293 [2021-11-09 08:37:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:23,023 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 2588 transitions. [2021-11-09 08:37:23,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2588 transitions. [2021-11-09 08:37:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-09 08:37:23,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:23,029 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2021-11-09 08:37:23,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-09 08:37:23,030 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1398068665, now seen corresponding path program 1 times [2021-11-09 08:37:23,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:23,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091279400] [2021-11-09 08:37:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:23,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-09 08:37:23,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:23,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091279400] [2021-11-09 08:37:23,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091279400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:23,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:23,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:23,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044193062] [2021-11-09 08:37:23,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:23,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:23,191 INFO L87 Difference]: Start difference. First operand 1692 states and 2588 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2021-11-09 08:37:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:23,274 INFO L93 Difference]: Finished difference Result 3631 states and 5571 transitions. [2021-11-09 08:37:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:23,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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 293 [2021-11-09 08:37:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:23,286 INFO L225 Difference]: With dead ends: 3631 [2021-11-09 08:37:23,286 INFO L226 Difference]: Without dead ends: 1962 [2021-11-09 08:37:23,289 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 [2021-11-09 08:37:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-11-09 08:37:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2021-11-09 08:37:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.5298317185109638) internal successors, (3000), 1961 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 3000 transitions. [2021-11-09 08:37:23,352 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 3000 transitions. Word has length 293 [2021-11-09 08:37:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:23,352 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 3000 transitions. [2021-11-09 08:37:23,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 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) [2021-11-09 08:37:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 3000 transitions. [2021-11-09 08:37:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-09 08:37:23,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:23,361 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2021-11-09 08:37:23,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-09 08:37:23,361 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash 106698153, now seen corresponding path program 1 times [2021-11-09 08:37:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:23,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270543613] [2021-11-09 08:37:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:23,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 08:37:23,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:23,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270543613] [2021-11-09 08:37:23,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270543613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:23,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:23,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:23,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777597861] [2021-11-09 08:37:23,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:23,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:23,523 INFO L87 Difference]: Start difference. First operand 1962 states and 3000 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 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) [2021-11-09 08:37:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:23,617 INFO L93 Difference]: Finished difference Result 4176 states and 6402 transitions. [2021-11-09 08:37:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 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 333 [2021-11-09 08:37:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:23,631 INFO L225 Difference]: With dead ends: 4176 [2021-11-09 08:37:23,631 INFO L226 Difference]: Without dead ends: 2237 [2021-11-09 08:37:23,634 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 [2021-11-09 08:37:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-11-09 08:37:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2237. [2021-11-09 08:37:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 1.5326475849731664) internal successors, (3427), 2236 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3427 transitions. [2021-11-09 08:37:23,736 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3427 transitions. Word has length 333 [2021-11-09 08:37:23,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:23,736 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 3427 transitions. [2021-11-09 08:37:23,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 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) [2021-11-09 08:37:23,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3427 transitions. [2021-11-09 08:37:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-11-09 08:37:23,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:23,744 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 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] [2021-11-09 08:37:23,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-09 08:37:23,744 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:23,745 INFO L85 PathProgramCache]: Analyzing trace with hash -718404749, now seen corresponding path program 1 times [2021-11-09 08:37:23,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:23,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194211869] [2021-11-09 08:37:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:23,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2021-11-09 08:37:23,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:23,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194211869] [2021-11-09 08:37:23,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194211869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:23,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:23,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:37:23,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108687975] [2021-11-09 08:37:23,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:37:23,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:37:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:37:23,953 INFO L87 Difference]: Start difference. First operand 2237 states and 3427 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:24,044 INFO L93 Difference]: Finished difference Result 2514 states and 3857 transitions. [2021-11-09 08:37:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:37:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 376 [2021-11-09 08:37:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:24,060 INFO L225 Difference]: With dead ends: 2514 [2021-11-09 08:37:24,060 INFO L226 Difference]: Without dead ends: 2512 [2021-11-09 08:37:24,062 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 [2021-11-09 08:37:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-11-09 08:37:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2512. [2021-11-09 08:37:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 1.5352449223416966) internal successors, (3855), 2511 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3855 transitions. [2021-11-09 08:37:24,186 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3855 transitions. Word has length 376 [2021-11-09 08:37:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:24,187 INFO L470 AbstractCegarLoop]: Abstraction has 2512 states and 3855 transitions. [2021-11-09 08:37:24,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3855 transitions. [2021-11-09 08:37:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-09 08:37:24,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:24,198 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 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] [2021-11-09 08:37:24,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-09 08:37:24,199 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:24,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1740827691, now seen corresponding path program 1 times [2021-11-09 08:37:24,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:24,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811629730] [2021-11-09 08:37:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:24,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 922 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2021-11-09 08:37:24,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:24,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811629730] [2021-11-09 08:37:24,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811629730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:24,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:24,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:37:24,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844753349] [2021-11-09 08:37:24,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:37:24,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:37:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:24,668 INFO L87 Difference]: Start difference. First operand 2512 states and 3855 transitions. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:31,132 INFO L93 Difference]: Finished difference Result 8082 states and 12434 transitions. [2021-11-09 08:37:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:37:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 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 421 [2021-11-09 08:37:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:31,157 INFO L225 Difference]: With dead ends: 8082 [2021-11-09 08:37:31,157 INFO L226 Difference]: Without dead ends: 5593 [2021-11-09 08:37:31,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:37:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-11-09 08:37:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 5050. [2021-11-09 08:37:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5050 states, 5049 states have (on average 1.5648643295702118) internal successors, (7901), 5049 states have internal predecessors, (7901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 7901 transitions. [2021-11-09 08:37:31,350 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 7901 transitions. Word has length 421 [2021-11-09 08:37:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:31,351 INFO L470 AbstractCegarLoop]: Abstraction has 5050 states and 7901 transitions. [2021-11-09 08:37:31,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 7901 transitions. [2021-11-09 08:37:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-09 08:37:31,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:31,364 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 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] [2021-11-09 08:37:31,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-09 08:37:31,364 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash -450716821, now seen corresponding path program 1 times [2021-11-09 08:37:31,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:31,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143333720] [2021-11-09 08:37:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:31,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-11-09 08:37:31,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:31,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143333720] [2021-11-09 08:37:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143333720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:31,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:31,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:37:31,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560137590] [2021-11-09 08:37:31,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:37:31,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:31,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:37:31,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:31,719 INFO L87 Difference]: Start difference. First operand 5050 states and 7901 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:37,255 INFO L93 Difference]: Finished difference Result 17914 states and 27765 transitions. [2021-11-09 08:37:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:37:37,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 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 421 [2021-11-09 08:37:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:37,286 INFO L225 Difference]: With dead ends: 17914 [2021-11-09 08:37:37,287 INFO L226 Difference]: Without dead ends: 12887 [2021-11-09 08:37:37,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:37:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12887 states. [2021-11-09 08:37:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12887 to 7239. [2021-11-09 08:37:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7239 states, 7238 states have (on average 1.6273832550428295) internal successors, (11779), 7238 states have internal predecessors, (11779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7239 states to 7239 states and 11779 transitions. [2021-11-09 08:37:37,656 INFO L78 Accepts]: Start accepts. Automaton has 7239 states and 11779 transitions. Word has length 421 [2021-11-09 08:37:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:37,658 INFO L470 AbstractCegarLoop]: Abstraction has 7239 states and 11779 transitions. [2021-11-09 08:37:37,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7239 states and 11779 transitions. [2021-11-09 08:37:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-09 08:37:37,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:37,681 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 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] [2021-11-09 08:37:37,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-09 08:37:37,682 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1014141511, now seen corresponding path program 1 times [2021-11-09 08:37:37,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:37,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511375958] [2021-11-09 08:37:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:37,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 1008 proven. 0 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-09 08:37:37,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:37,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511375958] [2021-11-09 08:37:37,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511375958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:37,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:37,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:37:37,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085671011] [2021-11-09 08:37:37,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:37,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:37,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:37,844 INFO L87 Difference]: Start difference. First operand 7239 states and 11779 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:40,495 INFO L93 Difference]: Finished difference Result 15593 states and 25014 transitions. [2021-11-09 08:37:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:37:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 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 423 [2021-11-09 08:37:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:40,513 INFO L225 Difference]: With dead ends: 15593 [2021-11-09 08:37:40,514 INFO L226 Difference]: Without dead ends: 8377 [2021-11-09 08:37:40,520 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 [2021-11-09 08:37:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-11-09 08:37:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 7257. [2021-11-09 08:37:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7257 states, 7256 states have (on average 1.625826901874311) internal successors, (11797), 7256 states have internal predecessors, (11797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7257 states to 7257 states and 11797 transitions. [2021-11-09 08:37:40,753 INFO L78 Accepts]: Start accepts. Automaton has 7257 states and 11797 transitions. Word has length 423 [2021-11-09 08:37:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:40,754 INFO L470 AbstractCegarLoop]: Abstraction has 7257 states and 11797 transitions. [2021-11-09 08:37:40,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7257 states and 11797 transitions. [2021-11-09 08:37:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-09 08:37:40,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:40,769 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 3, 3, 3, 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] [2021-11-09 08:37:40,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-09 08:37:40,769 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 619140313, now seen corresponding path program 1 times [2021-11-09 08:37:40,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:40,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276360493] [2021-11-09 08:37:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:40,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 925 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2021-11-09 08:37:41,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:41,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276360493] [2021-11-09 08:37:41,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276360493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:41,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:41,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:37:41,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163601690] [2021-11-09 08:37:41,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:37:41,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:37:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:37:41,134 INFO L87 Difference]: Start difference. First operand 7257 states and 11797 transitions. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:47,024 INFO L93 Difference]: Finished difference Result 16877 states and 26574 transitions. [2021-11-09 08:37:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:37:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 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 423 [2021-11-09 08:37:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:47,043 INFO L225 Difference]: With dead ends: 16877 [2021-11-09 08:37:47,043 INFO L226 Difference]: Without dead ends: 9643 [2021-11-09 08:37:47,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:37:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9643 states. [2021-11-09 08:37:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9643 to 5797. [2021-11-09 08:37:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5797 states, 5796 states have (on average 1.5821256038647342) internal successors, (9170), 5796 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5797 states to 5797 states and 9170 transitions. [2021-11-09 08:37:47,300 INFO L78 Accepts]: Start accepts. Automaton has 5797 states and 9170 transitions. Word has length 423 [2021-11-09 08:37:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:47,301 INFO L470 AbstractCegarLoop]: Abstraction has 5797 states and 9170 transitions. [2021-11-09 08:37:47,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5797 states and 9170 transitions. [2021-11-09 08:37:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-09 08:37:47,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:47,313 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:37:47,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-09 08:37:47,314 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1402339225, now seen corresponding path program 1 times [2021-11-09 08:37:47,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:47,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255961662] [2021-11-09 08:37:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:47,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1814 backedges. 1146 proven. 92 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-09 08:37:47,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:47,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255961662] [2021-11-09 08:37:47,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255961662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:47,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474267707] [2021-11-09 08:37:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:47,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:47,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:47,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:47,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:37:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:37:47,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:48,072 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:37:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 08:37:48,225 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:37:48,225 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 28 treesize of output 10 [2021-11-09 08:37:48,367 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 20 treesize of output 8 [2021-11-09 08:37:48,595 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 74 treesize of output 50 [2021-11-09 08:37:48,600 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 50 treesize of output 38 [2021-11-09 08:37:48,642 INFO L354 Elim1Store]: treesize reduction 85, result has 30.9 percent of original size [2021-11-09 08:37:48,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 47 [2021-11-09 08:37:48,978 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:37:48,978 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 28 treesize of output 10 [2021-11-09 08:37:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1814 backedges. 1129 proven. 107 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-09 08:37:49,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474267707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:49,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:49,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-11-09 08:37:49,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321154054] [2021-11-09 08:37:49,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:37:49,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:37:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:37:49,530 INFO L87 Difference]: Start difference. First operand 5797 states and 9170 transitions. Second operand has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:56,625 INFO L93 Difference]: Finished difference Result 16897 states and 26495 transitions. [2021-11-09 08:37:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:37:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 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 447 [2021-11-09 08:37:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:56,648 INFO L225 Difference]: With dead ends: 16897 [2021-11-09 08:37:56,648 INFO L226 Difference]: Without dead ends: 11123 [2021-11-09 08:37:56,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:37:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11123 states. [2021-11-09 08:37:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11123 to 7489. [2021-11-09 08:37:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7489 states, 7488 states have (on average 1.638087606837607) internal successors, (12266), 7488 states have internal predecessors, (12266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7489 states to 7489 states and 12266 transitions. [2021-11-09 08:37:56,958 INFO L78 Accepts]: Start accepts. Automaton has 7489 states and 12266 transitions. Word has length 447 [2021-11-09 08:37:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:56,959 INFO L470 AbstractCegarLoop]: Abstraction has 7489 states and 12266 transitions. [2021-11-09 08:37:56,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 7489 states and 12266 transitions. [2021-11-09 08:37:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-09 08:37:56,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:56,974 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-11-09 08:37:57,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:57,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:57,193 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:57,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash -105572685, now seen corresponding path program 1 times [2021-11-09 08:37:57,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:57,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135434289] [2021-11-09 08:37:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:57,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 1025 proven. 63 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2021-11-09 08:37:57,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:57,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135434289] [2021-11-09 08:37:57,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135434289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:57,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639125440] [2021-11-09 08:37:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:57,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:57,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:57,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:37:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:37:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:58,567 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 20 treesize of output 8 [2021-11-09 08:37:58,877 INFO L354 Elim1Store]: treesize reduction 74, result has 46.0 percent of original size [2021-11-09 08:37:58,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 163 [2021-11-09 08:37:58,900 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 140 treesize of output 110 [2021-11-09 08:37:58,905 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 110 treesize of output 80 [2021-11-09 08:37:58,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 08:37:58,980 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-09 08:37:58,980 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 42 treesize of output 30 [2021-11-09 08:37:59,280 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 29 treesize of output 11 [2021-11-09 08:37:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 1025 proven. 63 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2021-11-09 08:37:59,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639125440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:59,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:59,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-09 08:37:59,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970053622] [2021-11-09 08:37:59,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:37:59,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:37:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:37:59,599 INFO L87 Difference]: Start difference. First operand 7489 states and 12266 transitions. Second operand has 9 states, 9 states have (on average 26.77777777777778) internal successors, (241), 9 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:06,255 INFO L93 Difference]: Finished difference Result 18318 states and 29629 transitions. [2021-11-09 08:38:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:38:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.77777777777778) internal successors, (241), 9 states have internal predecessors, (241), 0 states have call successors, (0), 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 451 [2021-11-09 08:38:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:06,271 INFO L225 Difference]: With dead ends: 18318 [2021-11-09 08:38:06,271 INFO L226 Difference]: Without dead ends: 10852 [2021-11-09 08:38:06,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:38:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10852 states. [2021-11-09 08:38:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10852 to 8650. [2021-11-09 08:38:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8650 states, 8649 states have (on average 1.636489767603191) internal successors, (14154), 8649 states have internal predecessors, (14154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8650 states to 8650 states and 14154 transitions. [2021-11-09 08:38:06,571 INFO L78 Accepts]: Start accepts. Automaton has 8650 states and 14154 transitions. Word has length 451 [2021-11-09 08:38:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:06,571 INFO L470 AbstractCegarLoop]: Abstraction has 8650 states and 14154 transitions. [2021-11-09 08:38:06,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.77777777777778) internal successors, (241), 9 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 8650 states and 14154 transitions. [2021-11-09 08:38:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-11-09 08:38:06,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:06,588 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:06,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:06,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 08:38:06,803 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1400307125, now seen corresponding path program 1 times [2021-11-09 08:38:06,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:06,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102809943] [2021-11-09 08:38:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:06,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1035 proven. 66 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2021-11-09 08:38:07,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:07,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102809943] [2021-11-09 08:38:07,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102809943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:07,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631553400] [2021-11-09 08:38:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:07,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:07,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:07,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:38:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:38:07,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:08,141 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 20 treesize of output 8 [2021-11-09 08:38:08,428 INFO L354 Elim1Store]: treesize reduction 74, result has 46.0 percent of original size [2021-11-09 08:38:08,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 163 [2021-11-09 08:38:08,435 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 140 treesize of output 110 [2021-11-09 08:38:08,440 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 110 treesize of output 80 [2021-11-09 08:38:08,489 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 9 treesize of output 3 [2021-11-09 08:38:08,621 INFO L354 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2021-11-09 08:38:08,622 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 19 treesize of output 18 [2021-11-09 08:38:08,924 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 29 treesize of output 11 [2021-11-09 08:38:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1035 proven. 66 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2021-11-09 08:38:09,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631553400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:09,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:09,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-09 08:38:09,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176355374] [2021-11-09 08:38:09,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:38:09,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:09,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:38:09,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:38:09,193 INFO L87 Difference]: Start difference. First operand 8650 states and 14154 transitions. Second operand has 9 states, 9 states have (on average 27.11111111111111) internal successors, (244), 9 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:14,013 INFO L93 Difference]: Finished difference Result 19250 states and 31028 transitions. [2021-11-09 08:38:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:38:14,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.11111111111111) internal successors, (244), 9 states have internal predecessors, (244), 0 states have call successors, (0), 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 453 [2021-11-09 08:38:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:14,023 INFO L225 Difference]: With dead ends: 19250 [2021-11-09 08:38:14,023 INFO L226 Difference]: Without dead ends: 10623 [2021-11-09 08:38:14,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:38:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10623 states. [2021-11-09 08:38:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10623 to 7930. [2021-11-09 08:38:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 1.6216420734014378) internal successors, (12858), 7929 states have internal predecessors, (12858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 12858 transitions. [2021-11-09 08:38:14,313 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 12858 transitions. Word has length 453 [2021-11-09 08:38:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:14,313 INFO L470 AbstractCegarLoop]: Abstraction has 7930 states and 12858 transitions. [2021-11-09 08:38:14,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.11111111111111) internal successors, (244), 9 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 12858 transitions. [2021-11-09 08:38:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-11-09 08:38:14,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:14,325 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:14,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:14,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 08:38:14,551 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:14,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2034476689, now seen corresponding path program 1 times [2021-11-09 08:38:14,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:14,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168390589] [2021-11-09 08:38:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:14,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1735 backedges. 942 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-09 08:38:14,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:14,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168390589] [2021-11-09 08:38:14,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168390589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:14,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:14,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:14,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407816381] [2021-11-09 08:38:14,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:14,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:14,701 INFO L87 Difference]: Start difference. First operand 7930 states and 12858 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:16,650 INFO L93 Difference]: Finished difference Result 16667 states and 26765 transitions. [2021-11-09 08:38:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 453 [2021-11-09 08:38:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:16,662 INFO L225 Difference]: With dead ends: 16667 [2021-11-09 08:38:16,662 INFO L226 Difference]: Without dead ends: 8760 [2021-11-09 08:38:16,667 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 [2021-11-09 08:38:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8760 states. [2021-11-09 08:38:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8760 to 7930. [2021-11-09 08:38:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 1.6193719258418464) internal successors, (12840), 7929 states have internal predecessors, (12840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 12840 transitions. [2021-11-09 08:38:16,899 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 12840 transitions. Word has length 453 [2021-11-09 08:38:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:16,900 INFO L470 AbstractCegarLoop]: Abstraction has 7930 states and 12840 transitions. [2021-11-09 08:38:16,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 12840 transitions. [2021-11-09 08:38:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-09 08:38:16,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:16,910 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:16,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-09 08:38:16,911 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1465239815, now seen corresponding path program 1 times [2021-11-09 08:38:16,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:16,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227800055] [2021-11-09 08:38:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:16,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 959 proven. 0 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2021-11-09 08:38:17,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:17,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227800055] [2021-11-09 08:38:17,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227800055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:17,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:17,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:17,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107014376] [2021-11-09 08:38:17,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:17,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:17,058 INFO L87 Difference]: Start difference. First operand 7930 states and 12840 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:18,167 INFO L93 Difference]: Finished difference Result 16667 states and 26729 transitions. [2021-11-09 08:38:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 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 455 [2021-11-09 08:38:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:18,181 INFO L225 Difference]: With dead ends: 16667 [2021-11-09 08:38:18,181 INFO L226 Difference]: Without dead ends: 8760 [2021-11-09 08:38:18,187 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 [2021-11-09 08:38:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8760 states. [2021-11-09 08:38:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8760 to 7930. [2021-11-09 08:38:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 1.617101778282255) internal successors, (12822), 7929 states have internal predecessors, (12822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 12822 transitions. [2021-11-09 08:38:18,365 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 12822 transitions. Word has length 455 [2021-11-09 08:38:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:18,365 INFO L470 AbstractCegarLoop]: Abstraction has 7930 states and 12822 transitions. [2021-11-09 08:38:18,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 12822 transitions. [2021-11-09 08:38:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-09 08:38:18,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:18,372 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:18,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-09 08:38:18,372 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:18,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1459353381, now seen corresponding path program 1 times [2021-11-09 08:38:18,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:18,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803284790] [2021-11-09 08:38:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:18,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1781 backedges. 976 proven. 0 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-09 08:38:18,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:18,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803284790] [2021-11-09 08:38:18,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803284790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:18,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:18,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:18,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678677897] [2021-11-09 08:38:18,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:18,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:18,549 INFO L87 Difference]: Start difference. First operand 7930 states and 12822 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:20,717 INFO L93 Difference]: Finished difference Result 16667 states and 26693 transitions. [2021-11-09 08:38:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:20,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 457 [2021-11-09 08:38:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:20,730 INFO L225 Difference]: With dead ends: 16667 [2021-11-09 08:38:20,730 INFO L226 Difference]: Without dead ends: 8760 [2021-11-09 08:38:20,736 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 [2021-11-09 08:38:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8760 states. [2021-11-09 08:38:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8760 to 7930. [2021-11-09 08:38:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 1.6148316307226636) internal successors, (12804), 7929 states have internal predecessors, (12804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 12804 transitions. [2021-11-09 08:38:21,015 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 12804 transitions. Word has length 457 [2021-11-09 08:38:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:21,016 INFO L470 AbstractCegarLoop]: Abstraction has 7930 states and 12804 transitions. [2021-11-09 08:38:21,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 12804 transitions. [2021-11-09 08:38:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-09 08:38:21,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:21,023 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:21,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-09 08:38:21,024 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1862019175, now seen corresponding path program 1 times [2021-11-09 08:38:21,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:21,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002723885] [2021-11-09 08:38:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:21,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 993 proven. 0 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2021-11-09 08:38:21,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:21,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002723885] [2021-11-09 08:38:21,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002723885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:21,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:21,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:21,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292583729] [2021-11-09 08:38:21,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:21,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:21,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:21,171 INFO L87 Difference]: Start difference. First operand 7930 states and 12804 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:23,729 INFO L93 Difference]: Finished difference Result 16577 states and 26549 transitions. [2021-11-09 08:38:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:23,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 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 459 [2021-11-09 08:38:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:23,788 INFO L225 Difference]: With dead ends: 16577 [2021-11-09 08:38:23,788 INFO L226 Difference]: Without dead ends: 8670 [2021-11-09 08:38:23,791 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 [2021-11-09 08:38:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2021-11-09 08:38:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 7930. [2021-11-09 08:38:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 1.6125614831630724) internal successors, (12786), 7929 states have internal predecessors, (12786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 12786 transitions. [2021-11-09 08:38:24,043 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 12786 transitions. Word has length 459 [2021-11-09 08:38:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:24,044 INFO L470 AbstractCegarLoop]: Abstraction has 7930 states and 12786 transitions. [2021-11-09 08:38:24,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 12786 transitions. [2021-11-09 08:38:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-11-09 08:38:24,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:24,051 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:38:24,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-09 08:38:24,052 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1015527261, now seen corresponding path program 1 times [2021-11-09 08:38:24,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:24,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965967626] [2021-11-09 08:38:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:24,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1959 backedges. 1114 proven. 0 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2021-11-09 08:38:24,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:24,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965967626] [2021-11-09 08:38:24,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965967626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:24,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:24,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:24,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813360670] [2021-11-09 08:38:24,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:24,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:24,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:24,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:24,207 INFO L87 Difference]: Start difference. First operand 7930 states and 12786 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:26,408 INFO L93 Difference]: Finished difference Result 16577 states and 26513 transitions. [2021-11-09 08:38:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:26,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 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 465 [2021-11-09 08:38:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:26,416 INFO L225 Difference]: With dead ends: 16577 [2021-11-09 08:38:26,416 INFO L226 Difference]: Without dead ends: 8670 [2021-11-09 08:38:26,421 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 [2021-11-09 08:38:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2021-11-09 08:38:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 7930. [2021-11-09 08:38:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 1.610291335603481) internal successors, (12768), 7929 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 12768 transitions. [2021-11-09 08:38:26,687 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 12768 transitions. Word has length 465 [2021-11-09 08:38:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:26,687 INFO L470 AbstractCegarLoop]: Abstraction has 7930 states and 12768 transitions. [2021-11-09 08:38:26,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 12768 transitions. [2021-11-09 08:38:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-09 08:38:26,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:26,696 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:38:26,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-09 08:38:26,696 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash -599888121, now seen corresponding path program 1 times [2021-11-09 08:38:26,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:26,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439479972] [2021-11-09 08:38:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:26,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 1127 proven. 0 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-09 08:38:26,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:26,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439479972] [2021-11-09 08:38:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439479972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:26,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:26,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:26,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545168795] [2021-11-09 08:38:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:26,851 INFO L87 Difference]: Start difference. First operand 7930 states and 12768 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:29,432 INFO L93 Difference]: Finished difference Result 16505 states and 26375 transitions. [2021-11-09 08:38:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 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 467 [2021-11-09 08:38:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:29,439 INFO L225 Difference]: With dead ends: 16505 [2021-11-09 08:38:29,439 INFO L226 Difference]: Without dead ends: 8598 [2021-11-09 08:38:29,445 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 [2021-11-09 08:38:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8598 states. [2021-11-09 08:38:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8598 to 7930. [2021-11-09 08:38:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 1.6080211880438895) internal successors, (12750), 7929 states have internal predecessors, (12750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 12750 transitions. [2021-11-09 08:38:29,626 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 12750 transitions. Word has length 467 [2021-11-09 08:38:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:29,627 INFO L470 AbstractCegarLoop]: Abstraction has 7930 states and 12750 transitions. [2021-11-09 08:38:29,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 12750 transitions. [2021-11-09 08:38:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-09 08:38:29,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:29,636 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:38:29,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-09 08:38:29,636 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash 807392487, now seen corresponding path program 1 times [2021-11-09 08:38:29,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:29,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359449824] [2021-11-09 08:38:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:29,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1992 backedges. 1174 proven. 0 refuted. 0 times theorem prover too weak. 818 trivial. 0 not checked. [2021-11-09 08:38:29,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:29,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359449824] [2021-11-09 08:38:29,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359449824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:29,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:29,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:29,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643216498] [2021-11-09 08:38:29,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:29,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:29,781 INFO L87 Difference]: Start difference. First operand 7930 states and 12750 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:32,282 INFO L93 Difference]: Finished difference Result 16685 states and 26759 transitions. [2021-11-09 08:38:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 467 [2021-11-09 08:38:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:32,290 INFO L225 Difference]: With dead ends: 16685 [2021-11-09 08:38:32,290 INFO L226 Difference]: Without dead ends: 8778 [2021-11-09 08:38:32,297 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 [2021-11-09 08:38:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2021-11-09 08:38:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 8398. [2021-11-09 08:38:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8398 states, 8397 states have (on average 1.6127188281529117) internal successors, (13542), 8397 states have internal predecessors, (13542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8398 states to 8398 states and 13542 transitions. [2021-11-09 08:38:32,489 INFO L78 Accepts]: Start accepts. Automaton has 8398 states and 13542 transitions. Word has length 467 [2021-11-09 08:38:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:32,489 INFO L470 AbstractCegarLoop]: Abstraction has 8398 states and 13542 transitions. [2021-11-09 08:38:32,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8398 states and 13542 transitions. [2021-11-09 08:38:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-11-09 08:38:32,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:32,497 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 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] [2021-11-09 08:38:32,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-09 08:38:32,497 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1712577789, now seen corresponding path program 1 times [2021-11-09 08:38:32,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:32,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625061715] [2021-11-09 08:38:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:32,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2067 backedges. 1237 proven. 0 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2021-11-09 08:38:32,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:32,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625061715] [2021-11-09 08:38:32,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625061715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:32,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:32,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:32,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205659182] [2021-11-09 08:38:32,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:32,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:32,649 INFO L87 Difference]: Start difference. First operand 8398 states and 13542 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:33,915 INFO L93 Difference]: Finished difference Result 17368 states and 27961 transitions. [2021-11-09 08:38:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 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 473 [2021-11-09 08:38:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:33,924 INFO L225 Difference]: With dead ends: 17368 [2021-11-09 08:38:33,924 INFO L226 Difference]: Without dead ends: 8993 [2021-11-09 08:38:33,927 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 [2021-11-09 08:38:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8993 states. [2021-11-09 08:38:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8993 to 8668. [2021-11-09 08:38:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8668 states, 8667 states have (on average 1.6164762893734856) internal successors, (14010), 8667 states have internal predecessors, (14010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8668 states to 8668 states and 14010 transitions. [2021-11-09 08:38:34,175 INFO L78 Accepts]: Start accepts. Automaton has 8668 states and 14010 transitions. Word has length 473 [2021-11-09 08:38:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:34,175 INFO L470 AbstractCegarLoop]: Abstraction has 8668 states and 14010 transitions. [2021-11-09 08:38:34,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 8668 states and 14010 transitions. [2021-11-09 08:38:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-09 08:38:34,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:34,183 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:38:34,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-09 08:38:34,183 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1585745039, now seen corresponding path program 1 times [2021-11-09 08:38:34,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:34,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808882108] [2021-11-09 08:38:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:34,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 1304 proven. 0 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2021-11-09 08:38:34,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:34,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808882108] [2021-11-09 08:38:34,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808882108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:34,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:34,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:38:34,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779932847] [2021-11-09 08:38:34,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:38:34,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:38:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:38:34,439 INFO L87 Difference]: Start difference. First operand 8668 states and 14010 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:40,015 INFO L93 Difference]: Finished difference Result 28486 states and 45886 transitions. [2021-11-09 08:38:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:38:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 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 479 [2021-11-09 08:38:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:40,031 INFO L225 Difference]: With dead ends: 28486 [2021-11-09 08:38:40,031 INFO L226 Difference]: Without dead ends: 19841 [2021-11-09 08:38:40,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:38:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19841 states. [2021-11-09 08:38:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19841 to 8371. [2021-11-09 08:38:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8371 states, 8370 states have (on average 1.6114695340501792) internal successors, (13488), 8370 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8371 states to 8371 states and 13488 transitions. [2021-11-09 08:38:40,304 INFO L78 Accepts]: Start accepts. Automaton has 8371 states and 13488 transitions. Word has length 479 [2021-11-09 08:38:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:40,304 INFO L470 AbstractCegarLoop]: Abstraction has 8371 states and 13488 transitions. [2021-11-09 08:38:40,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 8371 states and 13488 transitions. [2021-11-09 08:38:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-09 08:38:40,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:40,312 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-09 08:38:40,312 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash 970580807, now seen corresponding path program 1 times [2021-11-09 08:38:40,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:40,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78794918] [2021-11-09 08:38:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:40,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2012 backedges. 1088 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-11-09 08:38:40,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:40,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78794918] [2021-11-09 08:38:40,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78794918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:40,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:40,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:40,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265622794] [2021-11-09 08:38:40,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:40,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:40,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:40,465 INFO L87 Difference]: Start difference. First operand 8371 states and 13488 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:43,097 INFO L93 Difference]: Finished difference Result 17387 states and 27815 transitions. [2021-11-09 08:38:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 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 479 [2021-11-09 08:38:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:43,105 INFO L225 Difference]: With dead ends: 17387 [2021-11-09 08:38:43,105 INFO L226 Difference]: Without dead ends: 9039 [2021-11-09 08:38:43,108 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 [2021-11-09 08:38:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-11-09 08:38:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 8371. [2021-11-09 08:38:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8371 states, 8370 states have (on average 1.6093189964157706) internal successors, (13470), 8370 states have internal predecessors, (13470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8371 states to 8371 states and 13470 transitions. [2021-11-09 08:38:43,344 INFO L78 Accepts]: Start accepts. Automaton has 8371 states and 13470 transitions. Word has length 479 [2021-11-09 08:38:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:43,344 INFO L470 AbstractCegarLoop]: Abstraction has 8371 states and 13470 transitions. [2021-11-09 08:38:43,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 8371 states and 13470 transitions. [2021-11-09 08:38:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-09 08:38:43,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:43,352 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-09 08:38:43,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-09 08:38:43,352 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1427704057, now seen corresponding path program 1 times [2021-11-09 08:38:43,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:43,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771643443] [2021-11-09 08:38:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:43,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 1210 proven. 0 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2021-11-09 08:38:43,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:43,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771643443] [2021-11-09 08:38:43,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771643443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:43,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:43,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:38:43,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842821980] [2021-11-09 08:38:43,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:43,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:43,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:43,493 INFO L87 Difference]: Start difference. First operand 8371 states and 13470 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 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) [2021-11-09 08:38:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:46,104 INFO L93 Difference]: Finished difference Result 17747 states and 28505 transitions. [2021-11-09 08:38:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:46,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 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) Word has length 479 [2021-11-09 08:38:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:46,112 INFO L225 Difference]: With dead ends: 17747 [2021-11-09 08:38:46,113 INFO L226 Difference]: Without dead ends: 9399 [2021-11-09 08:38:46,116 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 [2021-11-09 08:38:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9399 states. [2021-11-09 08:38:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9399 to 8875. [2021-11-09 08:38:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8875 states, 8874 states have (on average 1.6152805949966194) internal successors, (14334), 8874 states have internal predecessors, (14334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8875 states to 8875 states and 14334 transitions. [2021-11-09 08:38:46,355 INFO L78 Accepts]: Start accepts. Automaton has 8875 states and 14334 transitions. Word has length 479 [2021-11-09 08:38:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 8875 states and 14334 transitions. [2021-11-09 08:38:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 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) [2021-11-09 08:38:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8875 states and 14334 transitions. [2021-11-09 08:38:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-09 08:38:46,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:46,363 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:38:46,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-09 08:38:46,363 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:46,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1828332653, now seen corresponding path program 1 times [2021-11-09 08:38:46,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:46,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038068703] [2021-11-09 08:38:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:46,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 960 proven. 563 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-11-09 08:38:47,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:47,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038068703] [2021-11-09 08:38:47,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038068703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:47,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034802751] [2021-11-09 08:38:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:47,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:47,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:47,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:38:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 08:38:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:48,920 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:38:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 08:38:49,140 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 08:38:49,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 08:38:49,343 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 14 treesize of output 12 [2021-11-09 08:38:49,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 24 [2021-11-09 08:38:49,501 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 20 treesize of output 8 [2021-11-09 08:38:49,812 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 08:38:49,812 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 79 treesize of output 63 [2021-11-09 08:38:49,841 INFO L354 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2021-11-09 08:38:49,841 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 60 treesize of output 79 [2021-11-09 08:38:49,853 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 08:38:49,853 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 79 treesize of output 57 [2021-11-09 08:38:50,750 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 08:38:50,750 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 120 treesize of output 98 [2021-11-09 08:38:50,779 INFO L354 Elim1Store]: treesize reduction 164, result has 15.9 percent of original size [2021-11-09 08:38:50,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 91 [2021-11-09 08:38:50,788 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 08:38:50,789 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 82 treesize of output 60 [2021-11-09 08:38:50,852 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 08:38:50,852 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 91 treesize of output 75 [2021-11-09 08:38:50,897 INFO L354 Elim1Store]: treesize reduction 168, result has 27.0 percent of original size [2021-11-09 08:38:50,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 99 [2021-11-09 08:38:50,921 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 08:38:50,921 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 90 treesize of output 68 [2021-11-09 08:38:52,145 INFO L354 Elim1Store]: treesize reduction 160, result has 35.0 percent of original size [2021-11-09 08:38:52,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 227 [2021-11-09 08:38:52,234 INFO L354 Elim1Store]: treesize reduction 90, result has 40.0 percent of original size [2021-11-09 08:38:52,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 230 treesize of output 215 [2021-11-09 08:38:52,363 INFO L354 Elim1Store]: treesize reduction 144, result has 44.0 percent of original size [2021-11-09 08:38:52,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 204 treesize of output 277 [2021-11-09 08:39:08,036 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-11-09 08:39:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 479 treesize of output 473 [2021-11-09 08:39:08,315 INFO L354 Elim1Store]: treesize reduction 204, result has 28.9 percent of original size [2021-11-09 08:39:08,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 476 treesize of output 458 [2021-11-09 08:39:08,575 INFO L354 Elim1Store]: treesize reduction 222, result has 22.6 percent of original size [2021-11-09 08:39:08,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 519 treesize of output 475 [2021-11-09 08:39:08,739 INFO L354 Elim1Store]: treesize reduction 214, result has 28.9 percent of original size [2021-11-09 08:39:08,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 540 treesize of output 506 [2021-11-09 08:39:08,836 INFO L354 Elim1Store]: treesize reduction 234, result has 22.3 percent of original size [2021-11-09 08:39:08,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 581 treesize of output 519 [2021-11-09 08:44:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,135 INFO L354 Elim1Store]: treesize reduction 138, result has 33.3 percent of original size [2021-11-09 08:44:23,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 550 treesize of output 522 [2021-11-09 08:44:23,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,224 INFO L354 Elim1Store]: treesize reduction 128, result has 33.7 percent of original size [2021-11-09 08:44:23,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 591 treesize of output 549 [2021-11-09 08:44:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,253 INFO L354 Elim1Store]: treesize reduction 83, result has 9.8 percent of original size [2021-11-09 08:44:23,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 634 treesize of output 597 [2021-11-09 08:44:31,304 INFO L354 Elim1Store]: treesize reduction 85, result has 14.1 percent of original size [2021-11-09 08:44:31,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 263 [2021-11-09 08:44:31,341 INFO L354 Elim1Store]: treesize reduction 67, result has 17.3 percent of original size [2021-11-09 08:44:31,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 213 [2021-11-09 08:44:31,432 INFO L354 Elim1Store]: treesize reduction 205, result has 20.2 percent of original size [2021-11-09 08:44:31,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 210 treesize of output 227 [2021-11-09 08:44:32,265 INFO L354 Elim1Store]: treesize reduction 146, result has 26.3 percent of original size [2021-11-09 08:44:32,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 9 case distinctions, treesize of input 72 treesize of output 95 [2021-11-09 08:44:32,858 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 08:44:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2021-11-09 08:44:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 1003 proven. 433 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-11-09 08:44:32,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034802751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:32,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:32,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2021-11-09 08:44:32,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033628488] [2021-11-09 08:44:32,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 08:44:32,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 08:44:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:44:32,909 INFO L87 Difference]: Start difference. First operand 8875 states and 14334 transitions. Second operand has 34 states, 34 states have (on average 14.264705882352942) internal successors, (485), 34 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:05,680 INFO L93 Difference]: Finished difference Result 87774 states and 134856 transitions. [2021-11-09 08:46:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-11-09 08:46:05,680 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 14.264705882352942) internal successors, (485), 34 states have internal predecessors, (485), 0 states have call successors, (0), 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 479 [2021-11-09 08:46:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:05,773 INFO L225 Difference]: With dead ends: 87774 [2021-11-09 08:46:05,773 INFO L226 Difference]: Without dead ends: 78879 [2021-11-09 08:46:05,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 527 SyntacticMatches, 3 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25394 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=5267, Invalid=55987, Unknown=2, NotChecked=0, Total=61256 [2021-11-09 08:46:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78879 states. [2021-11-09 08:46:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78879 to 47849. [2021-11-09 08:46:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47849 states, 47848 states have (on average 1.604769269352951) internal successors, (76785), 47848 states have internal predecessors, (76785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47849 states to 47849 states and 76785 transitions. [2021-11-09 08:46:08,108 INFO L78 Accepts]: Start accepts. Automaton has 47849 states and 76785 transitions. Word has length 479 [2021-11-09 08:46:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:08,109 INFO L470 AbstractCegarLoop]: Abstraction has 47849 states and 76785 transitions. [2021-11-09 08:46:08,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 14.264705882352942) internal successors, (485), 34 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 47849 states and 76785 transitions. [2021-11-09 08:46:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-09 08:46:08,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:08,144 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:08,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:08,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22d65587-774e-4f60-8717-e4303d1b2c36/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 08:46:08,345 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash 159049765, now seen corresponding path program 1 times [2021-11-09 08:46:08,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:08,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192411351] [2021-11-09 08:46:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:08,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 1105 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2021-11-09 08:46:08,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:08,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192411351] [2021-11-09 08:46:08,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192411351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:08,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:08,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:46:08,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068139814] [2021-11-09 08:46:08,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:46:08,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:46:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:46:08,718 INFO L87 Difference]: Start difference. First operand 47849 states and 76785 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:13,357 INFO L93 Difference]: Finished difference Result 99494 states and 158342 transitions. [2021-11-09 08:46:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:46:13,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 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 481 [2021-11-09 08:46:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:13,435 INFO L225 Difference]: With dead ends: 99494 [2021-11-09 08:46:13,435 INFO L226 Difference]: Without dead ends: 51668 [2021-11-09 08:46:13,454 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 [2021-11-09 08:46:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51668 states. [2021-11-09 08:46:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51668 to 47849. [2021-11-09 08:46:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47849 states, 47848 states have (on average 1.6016134425681323) internal successors, (76634), 47848 states have internal predecessors, (76634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47849 states to 47849 states and 76634 transitions. [2021-11-09 08:46:15,712 INFO L78 Accepts]: Start accepts. Automaton has 47849 states and 76634 transitions. Word has length 481 [2021-11-09 08:46:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:15,713 INFO L470 AbstractCegarLoop]: Abstraction has 47849 states and 76634 transitions. [2021-11-09 08:46:15,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 47849 states and 76634 transitions. [2021-11-09 08:46:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-11-09 08:46:15,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:15,751 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-09 08:46:15,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-09 08:46:15,751 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2012551161, now seen corresponding path program 1 times [2021-11-09 08:46:15,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:15,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900775101] [2021-11-09 08:46:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:15,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 1184 proven. 0 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2021-11-09 08:46:15,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:15,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900775101] [2021-11-09 08:46:15,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900775101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:15,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:15,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:46:15,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755445463] [2021-11-09 08:46:15,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:46:15,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:46:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:46:15,935 INFO L87 Difference]: Start difference. First operand 47849 states and 76634 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:21,011 INFO L93 Difference]: Finished difference Result 99494 states and 158040 transitions. [2021-11-09 08:46:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:46:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 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 483 [2021-11-09 08:46:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:21,082 INFO L225 Difference]: With dead ends: 99494 [2021-11-09 08:46:21,082 INFO L226 Difference]: Without dead ends: 51668 [2021-11-09 08:46:21,101 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 [2021-11-09 08:46:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51668 states. [2021-11-09 08:46:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51668 to 47849. [2021-11-09 08:46:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47849 states, 47848 states have (on average 1.598457615783314) internal successors, (76483), 47848 states have internal predecessors, (76483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47849 states to 47849 states and 76483 transitions. [2021-11-09 08:46:23,379 INFO L78 Accepts]: Start accepts. Automaton has 47849 states and 76483 transitions. Word has length 483 [2021-11-09 08:46:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:23,379 INFO L470 AbstractCegarLoop]: Abstraction has 47849 states and 76483 transitions. [2021-11-09 08:46:23,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 47849 states and 76483 transitions. [2021-11-09 08:46:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-09 08:46:23,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:23,415 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 6, 6, 3, 3, 3, 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, 1, 1, 1] [2021-11-09 08:46:23,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-09 08:46:23,416 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2110020164, now seen corresponding path program 1 times [2021-11-09 08:46:23,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:23,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719431839] [2021-11-09 08:46:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:23,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 1294 proven. 0 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-11-09 08:46:23,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:23,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719431839] [2021-11-09 08:46:23,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719431839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:23,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:23,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:46:23,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513580592] [2021-11-09 08:46:23,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:46:23,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:46:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:46:23,795 INFO L87 Difference]: Start difference. First operand 47849 states and 76483 transitions. Second operand has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:30,646 INFO L93 Difference]: Finished difference Result 106525 states and 168812 transitions. [2021-11-09 08:46:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:46:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 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 484 [2021-11-09 08:46:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:30,730 INFO L225 Difference]: With dead ends: 106525 [2021-11-09 08:46:30,731 INFO L226 Difference]: Without dead ends: 58699 [2021-11-09 08:46:30,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:46:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58699 states. [2021-11-09 08:46:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58699 to 49221. [2021-11-09 08:46:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49221 states, 49220 states have (on average 1.600568874441284) internal successors, (78780), 49220 states have internal predecessors, (78780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49221 states to 49221 states and 78780 transitions. [2021-11-09 08:46:32,882 INFO L78 Accepts]: Start accepts. Automaton has 49221 states and 78780 transitions. Word has length 484 [2021-11-09 08:46:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:32,882 INFO L470 AbstractCegarLoop]: Abstraction has 49221 states and 78780 transitions. [2021-11-09 08:46:32,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 49221 states and 78780 transitions. [2021-11-09 08:46:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-11-09 08:46:32,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:32,919 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-09 08:46:32,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-09 08:46:32,919 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2119288739, now seen corresponding path program 1 times [2021-11-09 08:46:32,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:32,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608645614] [2021-11-09 08:46:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:32,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 1197 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2021-11-09 08:46:33,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:33,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608645614] [2021-11-09 08:46:33,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608645614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:33,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:33,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:46:33,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907227871] [2021-11-09 08:46:33,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:46:33,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:46:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:46:33,085 INFO L87 Difference]: Start difference. First operand 49221 states and 78780 transitions. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:38,062 INFO L93 Difference]: Finished difference Result 101824 states and 161648 transitions. [2021-11-09 08:46:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:46:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 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 485 [2021-11-09 08:46:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:38,131 INFO L225 Difference]: With dead ends: 101824 [2021-11-09 08:46:38,131 INFO L226 Difference]: Without dead ends: 52626 [2021-11-09 08:46:38,149 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 [2021-11-09 08:46:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52626 states. [2021-11-09 08:46:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52626 to 49221. [2021-11-09 08:46:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49221 states, 49220 states have (on average 1.5975010158472165) internal successors, (78629), 49220 states have internal predecessors, (78629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49221 states to 49221 states and 78629 transitions. [2021-11-09 08:46:40,130 INFO L78 Accepts]: Start accepts. Automaton has 49221 states and 78629 transitions. Word has length 485 [2021-11-09 08:46:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:40,130 INFO L470 AbstractCegarLoop]: Abstraction has 49221 states and 78629 transitions. [2021-11-09 08:46:40,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 49221 states and 78629 transitions. [2021-11-09 08:46:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-11-09 08:46:40,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:40,168 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:46:40,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-09 08:46:40,168 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1471533487, now seen corresponding path program 1 times [2021-11-09 08:46:40,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:40,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53259812] [2021-11-09 08:46:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:40,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 1236 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2021-11-09 08:46:40,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:40,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53259812] [2021-11-09 08:46:40,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53259812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:40,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:40,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:46:40,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362072881] [2021-11-09 08:46:40,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:46:40,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:46:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:46:40,515 INFO L87 Difference]: Start difference. First operand 49221 states and 78629 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:44,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:44,309 INFO L93 Difference]: Finished difference Result 102499 states and 163563 transitions. [2021-11-09 08:46:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:46:44,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 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 485 [2021-11-09 08:46:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:44,381 INFO L225 Difference]: With dead ends: 102499 [2021-11-09 08:46:44,381 INFO L226 Difference]: Without dead ends: 53301 [2021-11-09 08:46:44,400 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 [2021-11-09 08:46:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53301 states. [2021-11-09 08:46:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53301 to 52392. [2021-11-09 08:46:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52392 states, 52391 states have (on average 1.5988051382871105) internal successors, (83763), 52391 states have internal predecessors, (83763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52392 states to 52392 states and 83763 transitions. [2021-11-09 08:46:46,778 INFO L78 Accepts]: Start accepts. Automaton has 52392 states and 83763 transitions. Word has length 485 [2021-11-09 08:46:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:46,779 INFO L470 AbstractCegarLoop]: Abstraction has 52392 states and 83763 transitions. [2021-11-09 08:46:46,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 52392 states and 83763 transitions. [2021-11-09 08:46:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-11-09 08:46:46,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:46,856 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 6, 6, 3, 3, 3, 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, 1, 1, 1] [2021-11-09 08:46:46,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-09 08:46:46,856 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1639877189, now seen corresponding path program 1 times [2021-11-09 08:46:46,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:46,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319577294] [2021-11-09 08:46:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:46,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 1303 proven. 0 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-11-09 08:46:47,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:47,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319577294] [2021-11-09 08:46:47,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319577294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:47,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:47,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:46:47,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22679570] [2021-11-09 08:46:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:46:47,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:47,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:46:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:46:47,307 INFO L87 Difference]: Start difference. First operand 52392 states and 83763 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:53,292 INFO L93 Difference]: Finished difference Result 113523 states and 179894 transitions. [2021-11-09 08:46:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:46:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 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 485 [2021-11-09 08:46:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:53,368 INFO L225 Difference]: With dead ends: 113523 [2021-11-09 08:46:53,368 INFO L226 Difference]: Without dead ends: 61154 [2021-11-09 08:46:53,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:46:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61154 states. [2021-11-09 08:46:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61154 to 52350. [2021-11-09 08:46:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52350 states, 52349 states have (on average 1.5964010773844772) internal successors, (83570), 52349 states have internal predecessors, (83570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52350 states to 52350 states and 83570 transitions. [2021-11-09 08:46:56,012 INFO L78 Accepts]: Start accepts. Automaton has 52350 states and 83570 transitions. Word has length 485 [2021-11-09 08:46:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:56,013 INFO L470 AbstractCegarLoop]: Abstraction has 52350 states and 83570 transitions. [2021-11-09 08:46:56,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 52350 states and 83570 transitions. [2021-11-09 08:46:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-09 08:46:56,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:56,052 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 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] [2021-11-09 08:46:56,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-09 08:46:56,052 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1918125543, now seen corresponding path program 1 times [2021-11-09 08:46:56,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:56,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999138543] [2021-11-09 08:46:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:56,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1349 proven. 0 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-09 08:46:56,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:56,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999138543] [2021-11-09 08:46:56,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999138543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:56,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:56,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:46:56,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055356359] [2021-11-09 08:46:56,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:46:56,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:46:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:46:56,209 INFO L87 Difference]: Start difference. First operand 52350 states and 83570 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:01,011 INFO L93 Difference]: Finished difference Result 114223 states and 181985 transitions. [2021-11-09 08:47:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:47:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 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 487 [2021-11-09 08:47:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:01,089 INFO L225 Difference]: With dead ends: 114223 [2021-11-09 08:47:01,089 INFO L226 Difference]: Without dead ends: 61896 [2021-11-09 08:47:01,112 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 [2021-11-09 08:47:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61896 states. [2021-11-09 08:47:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61896 to 57937. [2021-11-09 08:47:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57937 states, 57936 states have (on average 1.6118648163490747) internal successors, (93385), 57936 states have internal predecessors, (93385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57937 states to 57937 states and 93385 transitions. [2021-11-09 08:47:03,574 INFO L78 Accepts]: Start accepts. Automaton has 57937 states and 93385 transitions. Word has length 487 [2021-11-09 08:47:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:03,574 INFO L470 AbstractCegarLoop]: Abstraction has 57937 states and 93385 transitions. [2021-11-09 08:47:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 57937 states and 93385 transitions. [2021-11-09 08:47:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-09 08:47:03,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:03,628 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:47:03,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-09 08:47:03,629 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash 669254119, now seen corresponding path program 1 times [2021-11-09 08:47:03,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:03,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542064938] [2021-11-09 08:47:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:03,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 1319 proven. 0 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2021-11-09 08:47:03,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:03,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542064938] [2021-11-09 08:47:03,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542064938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:03,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:47:03,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:47:03,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851366990] [2021-11-09 08:47:03,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:47:03,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:47:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:47:03,809 INFO L87 Difference]: Start difference. First operand 57937 states and 93385 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)