./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_15-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/locks/test_locks_15-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad13fcacd201ae20f6800b42387b8ec1153fb1bf63cee7a12ec23f4a302be7c7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:42:22,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:42:22,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:42:22,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:42:22,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:42:22,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:42:22,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:42:22,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:42:22,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:42:22,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:42:22,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:42:22,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:42:22,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:42:22,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:42:22,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:42:22,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:42:22,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:42:22,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:42:22,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:42:22,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:42:22,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:42:22,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:42:22,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:42:22,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:42:22,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:42:22,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:42:22,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:42:22,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:42:22,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:42:22,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:42:22,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:42:22,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:42:22,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:42:22,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:42:22,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:42:22,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:42:22,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:42:22,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:42:22,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:42:22,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:42:22,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:42:22,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:42:23,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:42:23,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:42:23,055 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:42:23,055 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:42:23,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:42:23,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:42:23,058 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:42:23,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:42:23,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:42:23,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:42:23,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:42:23,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:42:23,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:42:23,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:42:23,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:42:23,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:42:23,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:42:23,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:42:23,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:42:23,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:42:23,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:42:23,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:42:23,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:42:23,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:42:23,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:42:23,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:42:23,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:42:23,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:42:23,066 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:42:23,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:42:23,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:42:23,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:42:23,069 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_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad13fcacd201ae20f6800b42387b8ec1153fb1bf63cee7a12ec23f4a302be7c7 [2021-11-07 07:42:23,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:42:23,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:42:23,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:42:23,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:42:23,425 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:42:23,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/locks/test_locks_15-2.c [2021-11-07 07:42:23,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/data/a3f959d4b/1a83c03d8c2249b4a687d42a306aaa5d/FLAG955b88b39 [2021-11-07 07:42:24,129 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:42:24,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/sv-benchmarks/c/locks/test_locks_15-2.c [2021-11-07 07:42:24,141 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/data/a3f959d4b/1a83c03d8c2249b4a687d42a306aaa5d/FLAG955b88b39 [2021-11-07 07:42:24,479 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/data/a3f959d4b/1a83c03d8c2249b4a687d42a306aaa5d [2021-11-07 07:42:24,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:42:24,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:42:24,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:42:24,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:42:24,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:42:24,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c2484d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24, skipping insertion in model container [2021-11-07 07:42:24,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:42:24,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:42:24,791 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_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/sv-benchmarks/c/locks/test_locks_15-2.c[5628,5641] [2021-11-07 07:42:24,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:42:24,808 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:42:24,843 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_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/sv-benchmarks/c/locks/test_locks_15-2.c[5628,5641] [2021-11-07 07:42:24,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:42:24,873 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:42:24,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24 WrapperNode [2021-11-07 07:42:24,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:42:24,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:42:24,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:42:24,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:42:24,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:42:24,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:42:24,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:42:24,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:42:24,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:42:24,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:42:24,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:42:24,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:42:24,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (1/1) ... [2021-11-07 07:42:24,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:42:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:25,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:42:25,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3a099d9-ccef-4b7f-bd7e-a9b78b065b99/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:42:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:42:25,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:42:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:42:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:42:25,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:42:25,561 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-07 07:42:25,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:42:25 BoogieIcfgContainer [2021-11-07 07:42:25,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:42:25,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:42:25,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:42:25,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:42:25,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:42:24" (1/3) ... [2021-11-07 07:42:25,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6570f421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:42:25, skipping insertion in model container [2021-11-07 07:42:25,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:42:24" (2/3) ... [2021-11-07 07:42:25,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6570f421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:42:25, skipping insertion in model container [2021-11-07 07:42:25,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:42:25" (3/3) ... [2021-11-07 07:42:25,576 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2021-11-07 07:42:25,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:42:25,583 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:42:25,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:42:25,686 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:42:25,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:42:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 54 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:42:25,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:25,714 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] [2021-11-07 07:42:25,715 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1188560455, now seen corresponding path program 1 times [2021-11-07 07:42:25,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:25,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65667278] [2021-11-07 07:42:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:25,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:26,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:26,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65667278] [2021-11-07 07:42:26,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65667278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:26,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:26,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:26,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75814896] [2021-11-07 07:42:26,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:26,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:26,094 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 54 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:26,182 INFO L93 Difference]: Finished difference Result 113 states and 205 transitions. [2021-11-07 07:42:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 07:42:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:26,211 INFO L225 Difference]: With dead ends: 113 [2021-11-07 07:42:26,211 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 07:42:26,216 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 [2021-11-07 07:42:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 07:42:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2021-11-07 07:42:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 66 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 126 transitions. [2021-11-07 07:42:26,298 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 126 transitions. Word has length 22 [2021-11-07 07:42:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:26,302 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 126 transitions. [2021-11-07 07:42:26,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 126 transitions. [2021-11-07 07:42:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:42:26,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:26,306 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] [2021-11-07 07:42:26,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:42:26,307 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1112262135, now seen corresponding path program 1 times [2021-11-07 07:42:26,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:26,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238843435] [2021-11-07 07:42:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:26,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:26,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:26,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238843435] [2021-11-07 07:42:26,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238843435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:26,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:26,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:26,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848395407] [2021-11-07 07:42:26,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:26,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:26,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:26,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:26,493 INFO L87 Difference]: Start difference. First operand 67 states and 126 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:26,529 INFO L93 Difference]: Finished difference Result 164 states and 309 transitions. [2021-11-07 07:42:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 07:42:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:26,532 INFO L225 Difference]: With dead ends: 164 [2021-11-07 07:42:26,533 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 07:42:26,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 07:42:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-11-07 07:42:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.8958333333333333) internal successors, (182), 96 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) [2021-11-07 07:42:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 182 transitions. [2021-11-07 07:42:26,554 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 182 transitions. Word has length 22 [2021-11-07 07:42:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:26,555 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 182 transitions. [2021-11-07 07:42:26,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 182 transitions. [2021-11-07 07:42:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:42:26,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:26,557 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] [2021-11-07 07:42:26,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:42:26,558 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1809543287, now seen corresponding path program 1 times [2021-11-07 07:42:26,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:26,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728633693] [2021-11-07 07:42:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:26,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:26,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:26,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728633693] [2021-11-07 07:42:26,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728633693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:26,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:26,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:26,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799744041] [2021-11-07 07:42:26,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:26,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:26,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:26,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:26,681 INFO L87 Difference]: Start difference. First operand 97 states and 182 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:26,731 INFO L93 Difference]: Finished difference Result 150 states and 276 transitions. [2021-11-07 07:42:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:26,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 07:42:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:26,741 INFO L225 Difference]: With dead ends: 150 [2021-11-07 07:42:26,742 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 07:42:26,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 07:42:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-11-07 07:42:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.8585858585858586) internal successors, (184), 99 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 184 transitions. [2021-11-07 07:42:26,765 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 184 transitions. Word has length 23 [2021-11-07 07:42:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:26,765 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 184 transitions. [2021-11-07 07:42:26,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 184 transitions. [2021-11-07 07:42:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:42:26,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:26,768 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] [2021-11-07 07:42:26,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:42:26,768 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash 120599545, now seen corresponding path program 1 times [2021-11-07 07:42:26,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:26,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135273679] [2021-11-07 07:42:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:26,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:26,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:26,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135273679] [2021-11-07 07:42:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135273679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:26,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:26,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:26,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119120329] [2021-11-07 07:42:26,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:26,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:26,877 INFO L87 Difference]: Start difference. First operand 100 states and 184 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:26,917 INFO L93 Difference]: Finished difference Result 193 states and 357 transitions. [2021-11-07 07:42:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:26,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 07:42:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:26,921 INFO L225 Difference]: With dead ends: 193 [2021-11-07 07:42:26,921 INFO L226 Difference]: Without dead ends: 191 [2021-11-07 07:42:26,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-07 07:42:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 133. [2021-11-07 07:42:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.856060606060606) internal successors, (245), 132 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 245 transitions. [2021-11-07 07:42:26,939 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 245 transitions. Word has length 23 [2021-11-07 07:42:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:26,940 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 245 transitions. [2021-11-07 07:42:26,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 245 transitions. [2021-11-07 07:42:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:42:26,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:26,943 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] [2021-11-07 07:42:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:42:26,944 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:26,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1873545161, now seen corresponding path program 1 times [2021-11-07 07:42:26,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:26,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322509085] [2021-11-07 07:42:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:26,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:27,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:27,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322509085] [2021-11-07 07:42:27,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322509085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:27,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:27,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:27,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60984985] [2021-11-07 07:42:27,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:27,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,016 INFO L87 Difference]: Start difference. First operand 133 states and 245 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:27,058 INFO L93 Difference]: Finished difference Result 321 states and 595 transitions. [2021-11-07 07:42:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 07:42:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:27,062 INFO L225 Difference]: With dead ends: 321 [2021-11-07 07:42:27,064 INFO L226 Difference]: Without dead ends: 193 [2021-11-07 07:42:27,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-07 07:42:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-11-07 07:42:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.8473684210526315) internal successors, (351), 190 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 351 transitions. [2021-11-07 07:42:27,105 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 351 transitions. Word has length 23 [2021-11-07 07:42:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:27,106 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 351 transitions. [2021-11-07 07:42:27,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 351 transitions. [2021-11-07 07:42:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:42:27,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:27,109 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] [2021-11-07 07:42:27,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:42:27,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash -556169332, now seen corresponding path program 1 times [2021-11-07 07:42:27,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:27,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508139819] [2021-11-07 07:42:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:27,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:27,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:27,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508139819] [2021-11-07 07:42:27,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508139819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:27,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:27,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:27,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899140188] [2021-11-07 07:42:27,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:27,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,183 INFO L87 Difference]: Start difference. First operand 191 states and 351 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:27,215 INFO L93 Difference]: Finished difference Result 288 states and 526 transitions. [2021-11-07 07:42:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 07:42:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:27,219 INFO L225 Difference]: With dead ends: 288 [2021-11-07 07:42:27,220 INFO L226 Difference]: Without dead ends: 195 [2021-11-07 07:42:27,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-07 07:42:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-11-07 07:42:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.828125) internal successors, (351), 192 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 351 transitions. [2021-11-07 07:42:27,244 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 351 transitions. Word has length 24 [2021-11-07 07:42:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:27,244 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 351 transitions. [2021-11-07 07:42:27,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 351 transitions. [2021-11-07 07:42:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:42:27,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:27,247 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] [2021-11-07 07:42:27,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:42:27,248 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2049854222, now seen corresponding path program 1 times [2021-11-07 07:42:27,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:27,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950218183] [2021-11-07 07:42:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:27,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:27,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:27,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950218183] [2021-11-07 07:42:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950218183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:27,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:27,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:27,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323400876] [2021-11-07 07:42:27,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:27,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,305 INFO L87 Difference]: Start difference. First operand 193 states and 351 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:27,330 INFO L93 Difference]: Finished difference Result 561 states and 1025 transitions. [2021-11-07 07:42:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 07:42:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:27,335 INFO L225 Difference]: With dead ends: 561 [2021-11-07 07:42:27,335 INFO L226 Difference]: Without dead ends: 375 [2021-11-07 07:42:27,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-07 07:42:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2021-11-07 07:42:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.814516129032258) internal successors, (675), 372 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 675 transitions. [2021-11-07 07:42:27,360 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 675 transitions. Word has length 24 [2021-11-07 07:42:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:27,361 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 675 transitions. [2021-11-07 07:42:27,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 675 transitions. [2021-11-07 07:42:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:42:27,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:27,364 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] [2021-11-07 07:42:27,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:42:27,364 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:27,365 INFO L85 PathProgramCache]: Analyzing trace with hash -250968368, now seen corresponding path program 1 times [2021-11-07 07:42:27,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:27,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981904345] [2021-11-07 07:42:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:27,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:27,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:27,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981904345] [2021-11-07 07:42:27,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981904345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:27,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:27,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:27,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864367543] [2021-11-07 07:42:27,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:27,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:27,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:27,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,443 INFO L87 Difference]: Start difference. First operand 373 states and 675 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:27,481 INFO L93 Difference]: Finished difference Result 481 states and 877 transitions. [2021-11-07 07:42:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 07:42:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:27,486 INFO L225 Difference]: With dead ends: 481 [2021-11-07 07:42:27,486 INFO L226 Difference]: Without dead ends: 479 [2021-11-07 07:42:27,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-07 07:42:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 373. [2021-11-07 07:42:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.803763440860215) internal successors, (671), 372 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 671 transitions. [2021-11-07 07:42:27,537 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 671 transitions. Word has length 24 [2021-11-07 07:42:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:27,538 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 671 transitions. [2021-11-07 07:42:27,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 671 transitions. [2021-11-07 07:42:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:42:27,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:27,542 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] [2021-11-07 07:42:27,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:42:27,542 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash -878816148, now seen corresponding path program 1 times [2021-11-07 07:42:27,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:27,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742744710] [2021-11-07 07:42:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:27,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:27,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:27,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742744710] [2021-11-07 07:42:27,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742744710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:27,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:27,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:27,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792078675] [2021-11-07 07:42:27,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:27,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,661 INFO L87 Difference]: Start difference. First operand 373 states and 671 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:27,706 INFO L93 Difference]: Finished difference Result 709 states and 1289 transitions. [2021-11-07 07:42:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 07:42:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:27,713 INFO L225 Difference]: With dead ends: 709 [2021-11-07 07:42:27,713 INFO L226 Difference]: Without dead ends: 707 [2021-11-07 07:42:27,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-07 07:42:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 513. [2021-11-07 07:42:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.779296875) internal successors, (911), 512 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 911 transitions. [2021-11-07 07:42:27,759 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 911 transitions. Word has length 25 [2021-11-07 07:42:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:27,760 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 911 transitions. [2021-11-07 07:42:27,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 911 transitions. [2021-11-07 07:42:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:42:27,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:27,772 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] [2021-11-07 07:42:27,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:42:27,773 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1422006442, now seen corresponding path program 1 times [2021-11-07 07:42:27,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:27,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376459838] [2021-11-07 07:42:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:27,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:27,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:27,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376459838] [2021-11-07 07:42:27,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376459838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:27,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:27,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:27,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423709042] [2021-11-07 07:42:27,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:27,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:27,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,825 INFO L87 Difference]: Start difference. First operand 513 states and 911 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:27,889 INFO L93 Difference]: Finished difference Result 1237 states and 2209 transitions. [2021-11-07 07:42:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 07:42:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:27,912 INFO L225 Difference]: With dead ends: 1237 [2021-11-07 07:42:27,912 INFO L226 Difference]: Without dead ends: 731 [2021-11-07 07:42:27,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-11-07 07:42:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 729. [2021-11-07 07:42:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 1.7733516483516483) internal successors, (1291), 728 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1291 transitions. [2021-11-07 07:42:27,958 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1291 transitions. Word has length 25 [2021-11-07 07:42:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:27,959 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1291 transitions. [2021-11-07 07:42:27,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1291 transitions. [2021-11-07 07:42:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:42:27,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:27,961 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] [2021-11-07 07:42:27,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:42:27,962 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1473284061, now seen corresponding path program 1 times [2021-11-07 07:42:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744046090] [2021-11-07 07:42:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:27,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:28,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:28,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744046090] [2021-11-07 07:42:28,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744046090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:28,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:28,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:28,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102074005] [2021-11-07 07:42:28,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:28,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,008 INFO L87 Difference]: Start difference. First operand 729 states and 1291 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:28,047 INFO L93 Difference]: Finished difference Result 1101 states and 1945 transitions. [2021-11-07 07:42:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:42:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:28,055 INFO L225 Difference]: With dead ends: 1101 [2021-11-07 07:42:28,055 INFO L226 Difference]: Without dead ends: 743 [2021-11-07 07:42:28,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-07 07:42:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 741. [2021-11-07 07:42:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.7554054054054054) internal successors, (1299), 740 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1299 transitions. [2021-11-07 07:42:28,087 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1299 transitions. Word has length 26 [2021-11-07 07:42:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:28,088 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1299 transitions. [2021-11-07 07:42:28,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1299 transitions. [2021-11-07 07:42:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:42:28,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:28,090 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] [2021-11-07 07:42:28,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:42:28,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1132739493, now seen corresponding path program 1 times [2021-11-07 07:42:28,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:28,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422130982] [2021-11-07 07:42:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:28,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:28,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:28,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422130982] [2021-11-07 07:42:28,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422130982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:28,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:28,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:28,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626267388] [2021-11-07 07:42:28,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:28,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,165 INFO L87 Difference]: Start difference. First operand 741 states and 1299 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:28,234 INFO L93 Difference]: Finished difference Result 1385 states and 2461 transitions. [2021-11-07 07:42:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:42:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:28,249 INFO L225 Difference]: With dead ends: 1385 [2021-11-07 07:42:28,253 INFO L226 Difference]: Without dead ends: 1383 [2021-11-07 07:42:28,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-11-07 07:42:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1029. [2021-11-07 07:42:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.722762645914397) internal successors, (1771), 1028 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1771 transitions. [2021-11-07 07:42:28,305 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1771 transitions. Word has length 26 [2021-11-07 07:42:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:28,307 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1771 transitions. [2021-11-07 07:42:28,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1771 transitions. [2021-11-07 07:42:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:42:28,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:28,315 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] [2021-11-07 07:42:28,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:42:28,316 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:28,317 INFO L85 PathProgramCache]: Analyzing trace with hash -861405213, now seen corresponding path program 1 times [2021-11-07 07:42:28,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:28,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662602351] [2021-11-07 07:42:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:28,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:28,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:28,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662602351] [2021-11-07 07:42:28,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662602351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:28,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:28,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:28,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317102206] [2021-11-07 07:42:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:28,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,385 INFO L87 Difference]: Start difference. First operand 1029 states and 1771 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:28,440 INFO L93 Difference]: Finished difference Result 2457 states and 4253 transitions. [2021-11-07 07:42:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:28,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:42:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:28,453 INFO L225 Difference]: With dead ends: 2457 [2021-11-07 07:42:28,453 INFO L226 Difference]: Without dead ends: 1447 [2021-11-07 07:42:28,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-11-07 07:42:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1445. [2021-11-07 07:42:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 1.7195290858725762) internal successors, (2483), 1444 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2483 transitions. [2021-11-07 07:42:28,522 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2483 transitions. Word has length 26 [2021-11-07 07:42:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:28,522 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 2483 transitions. [2021-11-07 07:42:28,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2483 transitions. [2021-11-07 07:42:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:42:28,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:28,525 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] [2021-11-07 07:42:28,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:42:28,526 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash 755399007, now seen corresponding path program 1 times [2021-11-07 07:42:28,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:28,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288168838] [2021-11-07 07:42:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:28,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:28,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:28,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288168838] [2021-11-07 07:42:28,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288168838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:28,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:28,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:28,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743713335] [2021-11-07 07:42:28,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:28,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,609 INFO L87 Difference]: Start difference. First operand 1445 states and 2483 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:28,671 INFO L93 Difference]: Finished difference Result 2169 states and 3717 transitions. [2021-11-07 07:42:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:42:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:28,697 INFO L225 Difference]: With dead ends: 2169 [2021-11-07 07:42:28,697 INFO L226 Difference]: Without dead ends: 1463 [2021-11-07 07:42:28,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-11-07 07:42:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1461. [2021-11-07 07:42:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 1.7006849315068493) internal successors, (2483), 1460 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2483 transitions. [2021-11-07 07:42:28,804 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2483 transitions. Word has length 27 [2021-11-07 07:42:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:28,804 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 2483 transitions. [2021-11-07 07:42:28,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2483 transitions. [2021-11-07 07:42:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:42:28,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:28,807 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] [2021-11-07 07:42:28,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:42:28,808 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash -933544735, now seen corresponding path program 1 times [2021-11-07 07:42:28,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:28,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195209878] [2021-11-07 07:42:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:28,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:28,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:28,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195209878] [2021-11-07 07:42:28,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195209878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:28,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:28,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:28,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119970039] [2021-11-07 07:42:28,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:28,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,884 INFO L87 Difference]: Start difference. First operand 1461 states and 2483 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:28,928 INFO L93 Difference]: Finished difference Result 2697 states and 4661 transitions. [2021-11-07 07:42:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:42:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:28,948 INFO L225 Difference]: With dead ends: 2697 [2021-11-07 07:42:28,949 INFO L226 Difference]: Without dead ends: 2695 [2021-11-07 07:42:28,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-11-07 07:42:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2053. [2021-11-07 07:42:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 1.662280701754386) internal successors, (3411), 2052 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 3411 transitions. [2021-11-07 07:42:29,037 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 3411 transitions. Word has length 27 [2021-11-07 07:42:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:29,037 INFO L470 AbstractCegarLoop]: Abstraction has 2053 states and 3411 transitions. [2021-11-07 07:42:29,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 3411 transitions. [2021-11-07 07:42:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:42:29,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:29,042 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] [2021-11-07 07:42:29,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:42:29,043 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:29,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1367277855, now seen corresponding path program 1 times [2021-11-07 07:42:29,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:29,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028348982] [2021-11-07 07:42:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:29,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:29,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:29,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028348982] [2021-11-07 07:42:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028348982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:29,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:29,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:29,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782250617] [2021-11-07 07:42:29,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:29,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:29,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:29,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:29,109 INFO L87 Difference]: Start difference. First operand 2053 states and 3411 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:29,175 INFO L93 Difference]: Finished difference Result 4873 states and 8149 transitions. [2021-11-07 07:42:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:42:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:29,197 INFO L225 Difference]: With dead ends: 4873 [2021-11-07 07:42:29,197 INFO L226 Difference]: Without dead ends: 2855 [2021-11-07 07:42:29,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-11-07 07:42:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2021-11-07 07:42:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 1.66164095371669) internal successors, (4739), 2852 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4739 transitions. [2021-11-07 07:42:29,354 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4739 transitions. Word has length 27 [2021-11-07 07:42:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:29,355 INFO L470 AbstractCegarLoop]: Abstraction has 2853 states and 4739 transitions. [2021-11-07 07:42:29,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4739 transitions. [2021-11-07 07:42:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:42:29,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:29,359 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] [2021-11-07 07:42:29,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:42:29,360 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1125097720, now seen corresponding path program 1 times [2021-11-07 07:42:29,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:29,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248858977] [2021-11-07 07:42:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:29,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:29,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:29,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248858977] [2021-11-07 07:42:29,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248858977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:29,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:29,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:29,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428292706] [2021-11-07 07:42:29,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:29,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:29,415 INFO L87 Difference]: Start difference. First operand 2853 states and 4739 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:29,480 INFO L93 Difference]: Finished difference Result 4281 states and 7093 transitions. [2021-11-07 07:42:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:29,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 07:42:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:29,502 INFO L225 Difference]: With dead ends: 4281 [2021-11-07 07:42:29,502 INFO L226 Difference]: Without dead ends: 2887 [2021-11-07 07:42:29,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-11-07 07:42:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2885. [2021-11-07 07:42:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 1.6432038834951457) internal successors, (4739), 2884 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 4739 transitions. [2021-11-07 07:42:29,633 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 4739 transitions. Word has length 28 [2021-11-07 07:42:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:29,633 INFO L470 AbstractCegarLoop]: Abstraction has 2885 states and 4739 transitions. [2021-11-07 07:42:29,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 4739 transitions. [2021-11-07 07:42:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:42:29,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:29,638 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] [2021-11-07 07:42:29,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:42:29,638 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash -563846022, now seen corresponding path program 1 times [2021-11-07 07:42:29,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:29,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604082664] [2021-11-07 07:42:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:29,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:29,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:29,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604082664] [2021-11-07 07:42:29,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604082664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:29,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:29,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:29,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671981089] [2021-11-07 07:42:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:29,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:29,700 INFO L87 Difference]: Start difference. First operand 2885 states and 4739 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:29,804 INFO L93 Difference]: Finished difference Result 5257 states and 8805 transitions. [2021-11-07 07:42:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 07:42:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:29,842 INFO L225 Difference]: With dead ends: 5257 [2021-11-07 07:42:29,842 INFO L226 Difference]: Without dead ends: 5255 [2021-11-07 07:42:29,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2021-11-07 07:42:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 4101. [2021-11-07 07:42:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4100 states have (on average 1.6007317073170733) internal successors, (6563), 4100 states have internal predecessors, (6563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 6563 transitions. [2021-11-07 07:42:30,016 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 6563 transitions. Word has length 28 [2021-11-07 07:42:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:30,016 INFO L470 AbstractCegarLoop]: Abstraction has 4101 states and 6563 transitions. [2021-11-07 07:42:30,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 6563 transitions. [2021-11-07 07:42:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:42:30,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:30,024 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] [2021-11-07 07:42:30,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:42:30,025 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1736976568, now seen corresponding path program 1 times [2021-11-07 07:42:30,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:30,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931463312] [2021-11-07 07:42:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:30,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:30,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:30,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931463312] [2021-11-07 07:42:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931463312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:30,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:30,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:30,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683039251] [2021-11-07 07:42:30,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:30,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:30,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:30,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:30,069 INFO L87 Difference]: Start difference. First operand 4101 states and 6563 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:30,228 INFO L93 Difference]: Finished difference Result 9673 states and 15589 transitions. [2021-11-07 07:42:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:30,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 07:42:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:30,264 INFO L225 Difference]: With dead ends: 9673 [2021-11-07 07:42:30,264 INFO L226 Difference]: Without dead ends: 5639 [2021-11-07 07:42:30,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-11-07 07:42:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 5637. [2021-11-07 07:42:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5637 states, 5636 states have (on average 1.60166784953868) internal successors, (9027), 5636 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 9027 transitions. [2021-11-07 07:42:30,538 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 9027 transitions. Word has length 28 [2021-11-07 07:42:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:30,539 INFO L470 AbstractCegarLoop]: Abstraction has 5637 states and 9027 transitions. [2021-11-07 07:42:30,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 9027 transitions. [2021-11-07 07:42:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:42:30,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:30,552 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] [2021-11-07 07:42:30,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:42:30,553 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash -299143724, now seen corresponding path program 1 times [2021-11-07 07:42:30,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:30,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85814206] [2021-11-07 07:42:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:30,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:30,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:30,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85814206] [2021-11-07 07:42:30,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85814206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:30,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:30,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:30,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653736764] [2021-11-07 07:42:30,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:30,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:30,602 INFO L87 Difference]: Start difference. First operand 5637 states and 9027 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:30,725 INFO L93 Difference]: Finished difference Result 8457 states and 13509 transitions. [2021-11-07 07:42:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 07:42:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:30,739 INFO L225 Difference]: With dead ends: 8457 [2021-11-07 07:42:30,739 INFO L226 Difference]: Without dead ends: 5703 [2021-11-07 07:42:30,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-11-07 07:42:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5701. [2021-11-07 07:42:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 5700 states have (on average 1.5836842105263158) internal successors, (9027), 5700 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 9027 transitions. [2021-11-07 07:42:30,933 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 9027 transitions. Word has length 29 [2021-11-07 07:42:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:30,933 INFO L470 AbstractCegarLoop]: Abstraction has 5701 states and 9027 transitions. [2021-11-07 07:42:30,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 9027 transitions. [2021-11-07 07:42:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:42:30,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:30,942 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] [2021-11-07 07:42:30,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:42:30,942 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1988087466, now seen corresponding path program 1 times [2021-11-07 07:42:30,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:30,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838822435] [2021-11-07 07:42:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:30,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:30,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:30,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838822435] [2021-11-07 07:42:30,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838822435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:30,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:30,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:30,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806836189] [2021-11-07 07:42:30,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:30,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:30,984 INFO L87 Difference]: Start difference. First operand 5701 states and 9027 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:31,165 INFO L93 Difference]: Finished difference Result 10249 states and 16581 transitions. [2021-11-07 07:42:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 07:42:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:31,190 INFO L225 Difference]: With dead ends: 10249 [2021-11-07 07:42:31,190 INFO L226 Difference]: Without dead ends: 10247 [2021-11-07 07:42:31,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-11-07 07:42:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 8197. [2021-11-07 07:42:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8196 states have (on average 1.5386774036115178) internal successors, (12611), 8196 states have internal predecessors, (12611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 12611 transitions. [2021-11-07 07:42:31,525 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 12611 transitions. Word has length 29 [2021-11-07 07:42:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:31,525 INFO L470 AbstractCegarLoop]: Abstraction has 8197 states and 12611 transitions. [2021-11-07 07:42:31,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 12611 transitions. [2021-11-07 07:42:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:42:31,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:31,542 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] [2021-11-07 07:42:31,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:42:31,542 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 312735124, now seen corresponding path program 1 times [2021-11-07 07:42:31,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:31,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012730155] [2021-11-07 07:42:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:31,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:31,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:31,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012730155] [2021-11-07 07:42:31,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012730155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:31,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:31,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:31,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024746786] [2021-11-07 07:42:31,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:31,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:31,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:31,593 INFO L87 Difference]: Start difference. First operand 8197 states and 12611 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:31,786 INFO L93 Difference]: Finished difference Result 19209 states and 29765 transitions. [2021-11-07 07:42:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:31,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 07:42:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:31,815 INFO L225 Difference]: With dead ends: 19209 [2021-11-07 07:42:31,815 INFO L226 Difference]: Without dead ends: 11143 [2021-11-07 07:42:31,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11143 states. [2021-11-07 07:42:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11143 to 11141. [2021-11-07 07:42:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11141 states, 11140 states have (on average 1.5399461400359067) internal successors, (17155), 11140 states have internal predecessors, (17155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 17155 transitions. [2021-11-07 07:42:32,386 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 17155 transitions. Word has length 29 [2021-11-07 07:42:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:32,386 INFO L470 AbstractCegarLoop]: Abstraction has 11141 states and 17155 transitions. [2021-11-07 07:42:32,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 17155 transitions. [2021-11-07 07:42:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:42:32,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:32,402 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] [2021-11-07 07:42:32,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 07:42:32,403 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1500955187, now seen corresponding path program 1 times [2021-11-07 07:42:32,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:32,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097858241] [2021-11-07 07:42:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:32,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:32,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:32,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097858241] [2021-11-07 07:42:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097858241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:32,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:32,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:32,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435125052] [2021-11-07 07:42:32,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:32,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:32,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:32,441 INFO L87 Difference]: Start difference. First operand 11141 states and 17155 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:32,682 INFO L93 Difference]: Finished difference Result 16713 states and 25669 transitions. [2021-11-07 07:42:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 07:42:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:32,709 INFO L225 Difference]: With dead ends: 16713 [2021-11-07 07:42:32,710 INFO L226 Difference]: Without dead ends: 11271 [2021-11-07 07:42:32,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2021-11-07 07:42:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 11269. [2021-11-07 07:42:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.522452964146255) internal successors, (17155), 11268 states have internal predecessors, (17155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 17155 transitions. [2021-11-07 07:42:33,160 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 17155 transitions. Word has length 30 [2021-11-07 07:42:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 11269 states and 17155 transitions. [2021-11-07 07:42:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 17155 transitions. [2021-11-07 07:42:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:42:33,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:33,180 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] [2021-11-07 07:42:33,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 07:42:33,180 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1105068367, now seen corresponding path program 1 times [2021-11-07 07:42:33,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:33,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976933679] [2021-11-07 07:42:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:33,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:33,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:33,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976933679] [2021-11-07 07:42:33,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976933679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:33,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:33,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:33,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34508268] [2021-11-07 07:42:33,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:33,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:33,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:33,227 INFO L87 Difference]: Start difference. First operand 11269 states and 17155 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:33,628 INFO L93 Difference]: Finished difference Result 19977 states and 31109 transitions. [2021-11-07 07:42:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 07:42:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:33,674 INFO L225 Difference]: With dead ends: 19977 [2021-11-07 07:42:33,675 INFO L226 Difference]: Without dead ends: 19975 [2021-11-07 07:42:33,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19975 states. [2021-11-07 07:42:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19975 to 16389. [2021-11-07 07:42:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 1.476385159873078) internal successors, (24195), 16388 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 24195 transitions. [2021-11-07 07:42:34,300 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 24195 transitions. Word has length 30 [2021-11-07 07:42:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:34,301 INFO L470 AbstractCegarLoop]: Abstraction has 16389 states and 24195 transitions. [2021-11-07 07:42:34,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 24195 transitions. [2021-11-07 07:42:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:42:34,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:34,332 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] [2021-11-07 07:42:34,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 07:42:34,333 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash -889076339, now seen corresponding path program 1 times [2021-11-07 07:42:34,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:34,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289461761] [2021-11-07 07:42:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:34,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:34,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:34,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289461761] [2021-11-07 07:42:34,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289461761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:34,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:34,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:34,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437146507] [2021-11-07 07:42:34,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:34,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:34,370 INFO L87 Difference]: Start difference. First operand 16389 states and 24195 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:34,840 INFO L93 Difference]: Finished difference Result 38153 states and 56709 transitions. [2021-11-07 07:42:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 07:42:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:35,036 INFO L225 Difference]: With dead ends: 38153 [2021-11-07 07:42:35,036 INFO L226 Difference]: Without dead ends: 22023 [2021-11-07 07:42:35,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22023 states. [2021-11-07 07:42:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22023 to 22021. [2021-11-07 07:42:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22021 states, 22020 states have (on average 1.4766121707538602) internal successors, (32515), 22020 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22021 states to 22021 states and 32515 transitions. [2021-11-07 07:42:35,883 INFO L78 Accepts]: Start accepts. Automaton has 22021 states and 32515 transitions. Word has length 30 [2021-11-07 07:42:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:35,883 INFO L470 AbstractCegarLoop]: Abstraction has 22021 states and 32515 transitions. [2021-11-07 07:42:35,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 22021 states and 32515 transitions. [2021-11-07 07:42:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:42:35,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:35,912 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] [2021-11-07 07:42:35,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 07:42:35,913 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash -102404535, now seen corresponding path program 1 times [2021-11-07 07:42:35,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:35,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814922630] [2021-11-07 07:42:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:35,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:35,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:35,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814922630] [2021-11-07 07:42:35,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814922630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:35,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:35,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:35,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156286187] [2021-11-07 07:42:35,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:35,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:35,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:35,954 INFO L87 Difference]: Start difference. First operand 22021 states and 32515 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:36,407 INFO L93 Difference]: Finished difference Result 33033 states and 48645 transitions. [2021-11-07 07:42:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:36,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 07:42:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:36,466 INFO L225 Difference]: With dead ends: 33033 [2021-11-07 07:42:36,466 INFO L226 Difference]: Without dead ends: 22279 [2021-11-07 07:42:36,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22279 states. [2021-11-07 07:42:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22279 to 22277. [2021-11-07 07:42:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22277 states, 22276 states have (on average 1.4596426647513019) internal successors, (32515), 22276 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22277 states to 22277 states and 32515 transitions. [2021-11-07 07:42:37,163 INFO L78 Accepts]: Start accepts. Automaton has 22277 states and 32515 transitions. Word has length 31 [2021-11-07 07:42:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:37,164 INFO L470 AbstractCegarLoop]: Abstraction has 22277 states and 32515 transitions. [2021-11-07 07:42:37,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 22277 states and 32515 transitions. [2021-11-07 07:42:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:42:37,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:37,201 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] [2021-11-07 07:42:37,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 07:42:37,202 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:37,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1791348277, now seen corresponding path program 1 times [2021-11-07 07:42:37,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:37,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403035407] [2021-11-07 07:42:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:37,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:37,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:37,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403035407] [2021-11-07 07:42:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403035407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:37,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:37,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:37,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503564251] [2021-11-07 07:42:37,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:37,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:37,234 INFO L87 Difference]: Start difference. First operand 22277 states and 32515 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:37,898 INFO L93 Difference]: Finished difference Result 38921 states and 58117 transitions. [2021-11-07 07:42:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:37,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 07:42:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:38,016 INFO L225 Difference]: With dead ends: 38921 [2021-11-07 07:42:38,017 INFO L226 Difference]: Without dead ends: 38919 [2021-11-07 07:42:38,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38919 states. [2021-11-07 07:42:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38919 to 32773. [2021-11-07 07:42:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32773 states, 32772 states have (on average 1.4139814475772001) internal successors, (46339), 32772 states have internal predecessors, (46339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32773 states to 32773 states and 46339 transitions. [2021-11-07 07:42:39,141 INFO L78 Accepts]: Start accepts. Automaton has 32773 states and 46339 transitions. Word has length 31 [2021-11-07 07:42:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:39,142 INFO L470 AbstractCegarLoop]: Abstraction has 32773 states and 46339 transitions. [2021-11-07 07:42:39,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 32773 states and 46339 transitions. [2021-11-07 07:42:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:42:39,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:39,181 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] [2021-11-07 07:42:39,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 07:42:39,181 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 509474313, now seen corresponding path program 1 times [2021-11-07 07:42:39,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:39,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647470406] [2021-11-07 07:42:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:39,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:39,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:39,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647470406] [2021-11-07 07:42:39,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647470406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:39,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:39,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:39,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716579190] [2021-11-07 07:42:39,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:39,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:39,221 INFO L87 Difference]: Start difference. First operand 32773 states and 46339 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:39,879 INFO L93 Difference]: Finished difference Result 75785 states and 107781 transitions. [2021-11-07 07:42:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:39,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 07:42:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:39,985 INFO L225 Difference]: With dead ends: 75785 [2021-11-07 07:42:39,985 INFO L226 Difference]: Without dead ends: 43527 [2021-11-07 07:42:40,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43527 states. [2021-11-07 07:42:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43527 to 43525. [2021-11-07 07:42:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43525 states, 43524 states have (on average 1.4117038875103392) internal successors, (61443), 43524 states have internal predecessors, (61443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43525 states to 43525 states and 61443 transitions. [2021-11-07 07:42:41,448 INFO L78 Accepts]: Start accepts. Automaton has 43525 states and 61443 transitions. Word has length 31 [2021-11-07 07:42:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:41,449 INFO L470 AbstractCegarLoop]: Abstraction has 43525 states and 61443 transitions. [2021-11-07 07:42:41,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 43525 states and 61443 transitions. [2021-11-07 07:42:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:42:41,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:41,481 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] [2021-11-07 07:42:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 07:42:41,481 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 302993058, now seen corresponding path program 1 times [2021-11-07 07:42:41,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:41,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344457744] [2021-11-07 07:42:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:41,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:41,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:41,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344457744] [2021-11-07 07:42:41,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344457744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:41,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:41,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:41,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332075525] [2021-11-07 07:42:41,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:41,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:41,518 INFO L87 Difference]: Start difference. First operand 43525 states and 61443 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:42,360 INFO L93 Difference]: Finished difference Result 65289 states and 91909 transitions. [2021-11-07 07:42:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:42,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 07:42:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:42,430 INFO L225 Difference]: With dead ends: 65289 [2021-11-07 07:42:42,431 INFO L226 Difference]: Without dead ends: 44039 [2021-11-07 07:42:42,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44039 states. [2021-11-07 07:42:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44039 to 44037. [2021-11-07 07:42:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44037 states, 44036 states have (on average 1.395290217095104) internal successors, (61443), 44036 states have internal predecessors, (61443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44037 states to 44037 states and 61443 transitions. [2021-11-07 07:42:43,590 INFO L78 Accepts]: Start accepts. Automaton has 44037 states and 61443 transitions. Word has length 32 [2021-11-07 07:42:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:43,590 INFO L470 AbstractCegarLoop]: Abstraction has 44037 states and 61443 transitions. [2021-11-07 07:42:43,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 44037 states and 61443 transitions. [2021-11-07 07:42:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:42:43,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:43,622 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] [2021-11-07 07:42:43,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 07:42:43,623 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1385950684, now seen corresponding path program 1 times [2021-11-07 07:42:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:43,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717345983] [2021-11-07 07:42:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:43,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:43,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:43,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717345983] [2021-11-07 07:42:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717345983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:43,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:43,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:43,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194126972] [2021-11-07 07:42:43,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:43,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:43,653 INFO L87 Difference]: Start difference. First operand 44037 states and 61443 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:44,715 INFO L93 Difference]: Finished difference Result 129033 states and 178181 transitions. [2021-11-07 07:42:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:44,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 07:42:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:44,852 INFO L225 Difference]: With dead ends: 129033 [2021-11-07 07:42:44,852 INFO L226 Difference]: Without dead ends: 86023 [2021-11-07 07:42:44,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86023 states. [2021-11-07 07:42:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86023 to 86021. [2021-11-07 07:42:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86021 states, 86020 states have (on average 1.357114624505929) internal successors, (116739), 86020 states have internal predecessors, (116739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86021 states to 86021 states and 116739 transitions. [2021-11-07 07:42:47,163 INFO L78 Accepts]: Start accepts. Automaton has 86021 states and 116739 transitions. Word has length 32 [2021-11-07 07:42:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:47,164 INFO L470 AbstractCegarLoop]: Abstraction has 86021 states and 116739 transitions. [2021-11-07 07:42:47,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 86021 states and 116739 transitions. [2021-11-07 07:42:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:42:47,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:47,229 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] [2021-11-07 07:42:47,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 07:42:47,230 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash 608194022, now seen corresponding path program 1 times [2021-11-07 07:42:47,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:47,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052573825] [2021-11-07 07:42:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:47,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:47,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:47,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052573825] [2021-11-07 07:42:47,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052573825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:47,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:47,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:47,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065794080] [2021-11-07 07:42:47,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:47,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:47,276 INFO L87 Difference]: Start difference. First operand 86021 states and 116739 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:48,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:48,090 INFO L93 Difference]: Finished difference Result 96265 states and 135173 transitions. [2021-11-07 07:42:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 07:42:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:48,213 INFO L225 Difference]: With dead ends: 96265 [2021-11-07 07:42:48,213 INFO L226 Difference]: Without dead ends: 96263 [2021-11-07 07:42:48,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96263 states. [2021-11-07 07:42:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96263 to 86021. [2021-11-07 07:42:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86021 states, 86020 states have (on average 1.345210416182283) internal successors, (115715), 86020 states have internal predecessors, (115715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86021 states to 86021 states and 115715 transitions. [2021-11-07 07:42:50,532 INFO L78 Accepts]: Start accepts. Automaton has 86021 states and 115715 transitions. Word has length 32 [2021-11-07 07:42:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:50,532 INFO L470 AbstractCegarLoop]: Abstraction has 86021 states and 115715 transitions. [2021-11-07 07:42:50,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 86021 states and 115715 transitions. [2021-11-07 07:42:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 07:42:50,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:50,641 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] [2021-11-07 07:42:50,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 07:42:50,642 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash -14583106, now seen corresponding path program 1 times [2021-11-07 07:42:50,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:50,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850770441] [2021-11-07 07:42:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:50,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:50,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:50,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850770441] [2021-11-07 07:42:50,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850770441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:50,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:50,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:50,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492616866] [2021-11-07 07:42:50,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:50,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:50,682 INFO L87 Difference]: Start difference. First operand 86021 states and 115715 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:52,342 INFO L93 Difference]: Finished difference Result 146441 states and 200709 transitions. [2021-11-07 07:42:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 07:42:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:52,547 INFO L225 Difference]: With dead ends: 146441 [2021-11-07 07:42:52,548 INFO L226 Difference]: Without dead ends: 146439 [2021-11-07 07:42:52,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146439 states. [2021-11-07 07:42:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146439 to 130053. [2021-11-07 07:42:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130053 states, 130052 states have (on average 1.3070694799003475) internal successors, (169987), 130052 states have internal predecessors, (169987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130053 states to 130053 states and 169987 transitions. [2021-11-07 07:42:55,131 INFO L78 Accepts]: Start accepts. Automaton has 130053 states and 169987 transitions. Word has length 33 [2021-11-07 07:42:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:55,131 INFO L470 AbstractCegarLoop]: Abstraction has 130053 states and 169987 transitions. [2021-11-07 07:42:55,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 130053 states and 169987 transitions. [2021-11-07 07:42:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 07:42:55,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:55,222 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] [2021-11-07 07:42:55,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 07:42:55,222 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2008727812, now seen corresponding path program 1 times [2021-11-07 07:42:55,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:55,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684479904] [2021-11-07 07:42:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:55,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:55,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:55,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684479904] [2021-11-07 07:42:55,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684479904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:42:55,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:42:55,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:42:55,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669503572] [2021-11-07 07:42:55,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:42:55,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:42:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:55,258 INFO L87 Difference]: Start difference. First operand 130053 states and 169987 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:58,144 INFO L93 Difference]: Finished difference Result 297993 states and 391173 transitions. [2021-11-07 07:42:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:42:58,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 07:42:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:58,363 INFO L225 Difference]: With dead ends: 297993 [2021-11-07 07:42:58,363 INFO L226 Difference]: Without dead ends: 168967 [2021-11-07 07:42:58,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:42:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168967 states. [2021-11-07 07:43:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168967 to 168965. [2021-11-07 07:43:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168965 states, 168964 states have (on average 1.2969567481830448) internal successors, (219139), 168964 states have internal predecessors, (219139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168965 states to 168965 states and 219139 transitions. [2021-11-07 07:43:02,474 INFO L78 Accepts]: Start accepts. Automaton has 168965 states and 219139 transitions. Word has length 33 [2021-11-07 07:43:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:02,474 INFO L470 AbstractCegarLoop]: Abstraction has 168965 states and 219139 transitions. [2021-11-07 07:43:02,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 168965 states and 219139 transitions. [2021-11-07 07:43:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:43:02,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:02,631 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] [2021-11-07 07:43:02,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 07:43:02,632 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash -451860807, now seen corresponding path program 1 times [2021-11-07 07:43:02,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:02,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843334821] [2021-11-07 07:43:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:02,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:02,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:02,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843334821] [2021-11-07 07:43:02,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843334821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:02,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:02,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:02,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039660330] [2021-11-07 07:43:02,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:02,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:02,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:02,738 INFO L87 Difference]: Start difference. First operand 168965 states and 219139 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:04,885 INFO L93 Difference]: Finished difference Result 254985 states and 330757 transitions. [2021-11-07 07:43:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:04,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 07:43:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:05,075 INFO L225 Difference]: With dead ends: 254985 [2021-11-07 07:43:05,076 INFO L226 Difference]: Without dead ends: 172039 [2021-11-07 07:43:05,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172039 states. [2021-11-07 07:43:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172039 to 172037. [2021-11-07 07:43:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172037 states, 172036 states have (on average 1.2857018298495664) internal successors, (221187), 172036 states have internal predecessors, (221187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172037 states to 172037 states and 221187 transitions. [2021-11-07 07:43:09,163 INFO L78 Accepts]: Start accepts. Automaton has 172037 states and 221187 transitions. Word has length 34 [2021-11-07 07:43:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:09,163 INFO L470 AbstractCegarLoop]: Abstraction has 172037 states and 221187 transitions. [2021-11-07 07:43:09,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 172037 states and 221187 transitions. [2021-11-07 07:43:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:43:09,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:09,387 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] [2021-11-07 07:43:09,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 07:43:09,387 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2140804549, now seen corresponding path program 1 times [2021-11-07 07:43:09,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:09,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952011859] [2021-11-07 07:43:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:09,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:09,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:09,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952011859] [2021-11-07 07:43:09,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952011859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:09,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:09,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:09,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992686926] [2021-11-07 07:43:09,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:09,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:09,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:09,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:09,424 INFO L87 Difference]: Start difference. First operand 172037 states and 221187 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:12,389 INFO L93 Difference]: Finished difference Result 286729 states and 372741 transitions. [2021-11-07 07:43:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:12,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 07:43:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:12,779 INFO L225 Difference]: With dead ends: 286729 [2021-11-07 07:43:12,779 INFO L226 Difference]: Without dead ends: 286727 [2021-11-07 07:43:12,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286727 states.