./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL --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 584120db80e48cf9596b5da45bc5f64e7e8f9b48dd0380aa05459606ea632f16 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:23:40,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:23:40,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:23:40,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:23:40,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:23:40,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:23:40,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:23:40,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:23:40,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:23:40,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:23:40,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:23:40,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:23:40,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:23:40,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:23:40,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:23:40,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:23:40,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:23:40,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:23:40,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:23:40,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:23:40,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:23:40,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:23:40,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:23:40,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:23:40,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:23:40,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:23:40,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:23:40,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:23:40,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:23:40,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:23:40,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:23:40,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:23:40,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:23:40,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:23:40,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:23:40,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:23:40,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:23:40,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:23:40,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:23:40,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:23:40,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:23:40,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:23:40,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:23:40,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:23:40,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:23:40,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:23:40,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:23:40,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:23:40,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:23:40,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:23:40,866 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:23:40,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:23:40,866 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:23:40,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:23:40,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:23:40,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:23:40,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:23:40,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:23:40,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:23:40,868 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:23:40,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:23:40,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:23:40,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:23:40,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:23:40,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:23:40,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:23:40,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:23:40,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:23:40,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:23:40,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:23:40,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:23:40,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:23:40,870 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:23:40,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:23:40,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:23:40,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:23:40,871 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_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 584120db80e48cf9596b5da45bc5f64e7e8f9b48dd0380aa05459606ea632f16 [2021-11-19 04:23:41,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:23:41,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:23:41,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:23:41,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:23:41,308 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:23:41,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/eca-rers2012/Problem17_label47.c [2021-11-19 04:23:41,389 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/data/790199f30/d6f4ec0d36ca418fab352c1bdbc2f282/FLAG6fd2bfde9 [2021-11-19 04:23:42,291 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:23:42,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/sv-benchmarks/c/eca-rers2012/Problem17_label47.c [2021-11-19 04:23:42,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/data/790199f30/d6f4ec0d36ca418fab352c1bdbc2f282/FLAG6fd2bfde9 [2021-11-19 04:23:42,812 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/data/790199f30/d6f4ec0d36ca418fab352c1bdbc2f282 [2021-11-19 04:23:42,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:23:42,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:23:42,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:23:42,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:23:42,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:23:42,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:23:42" (1/1) ... [2021-11-19 04:23:42,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700b223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:42, skipping insertion in model container [2021-11-19 04:23:42,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:23:42" (1/1) ... [2021-11-19 04:23:42,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:23:42,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:23:43,318 WARN L230 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_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/sv-benchmarks/c/eca-rers2012/Problem17_label47.c[6608,6621] [2021-11-19 04:23:44,245 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:23:44,266 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:23:44,322 WARN L230 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_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/sv-benchmarks/c/eca-rers2012/Problem17_label47.c[6608,6621] [2021-11-19 04:23:44,808 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:23:44,835 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:23:44,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44 WrapperNode [2021-11-19 04:23:44,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:23:44,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:23:44,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:23:44,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:23:44,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:44,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:45,420 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-19 04:23:45,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:23:45,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:23:45,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:23:45,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:23:45,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:45,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:45,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:45,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:45,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:45,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:45,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:46,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:23:46,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:23:46,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:23:46,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:23:46,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (1/1) ... [2021-11-19 04:23:46,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:23:46,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:46,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:23:46,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5dfa964-1bf1-498d-a2ae-2aec3d921ffd/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:23:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:23:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:23:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:23:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:23:46,342 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:23:46,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:23:51,001 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:23:51,021 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:23:51,022 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:23:51,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:23:51 BoogieIcfgContainer [2021-11-19 04:23:51,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:23:51,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:23:51,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:23:51,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:23:51,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:23:42" (1/3) ... [2021-11-19 04:23:51,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6879b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:23:51, skipping insertion in model container [2021-11-19 04:23:51,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:23:44" (2/3) ... [2021-11-19 04:23:51,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6879b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:23:51, skipping insertion in model container [2021-11-19 04:23:51,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:23:51" (3/3) ... [2021-11-19 04:23:51,037 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label47.c [2021-11-19 04:23:51,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:23:51,045 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:23:51,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:23:51,125 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 [2021-11-19 04:23:51,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:23:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:23:51,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:51,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:51,177 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2021-11-19 04:23:51,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:51,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257915522] [2021-11-19 04:23:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:51,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:51,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:51,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257915522] [2021-11-19 04:23:51,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257915522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:23:51,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:23:51,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:23:51,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459184967] [2021-11-19 04:23:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:23:51,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:23:51,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:51,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:23:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:23:51,607 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:56,165 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-11-19 04:23:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:23:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-19 04:23:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:56,197 INFO L225 Difference]: With dead ends: 1644 [2021-11-19 04:23:56,198 INFO L226 Difference]: Without dead ends: 977 [2021-11-19 04:23:56,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:23:56,211 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 444 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:56,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 04:23:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-19 04:23:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-11-19 04:23:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-11-19 04:23:56,358 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 44 [2021-11-19 04:23:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:56,359 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-11-19 04:23:56,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-11-19 04:23:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 04:23:56,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:56,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:56,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:23:56,368 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1801670618, now seen corresponding path program 1 times [2021-11-19 04:23:56,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:56,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954574813] [2021-11-19 04:23:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:56,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:56,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:56,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954574813] [2021-11-19 04:23:56,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954574813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:23:56,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:23:56,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:23:56,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029822271] [2021-11-19 04:23:56,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:23:56,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:23:56,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:23:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:23:56,660 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:00,449 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2021-11-19 04:24:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-19 04:24:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:00,467 INFO L225 Difference]: With dead ends: 2815 [2021-11-19 04:24:00,467 INFO L226 Difference]: Without dead ends: 1846 [2021-11-19 04:24:00,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:00,480 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:00,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 580 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 04:24:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-11-19 04:24:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2021-11-19 04:24:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2021-11-19 04:24:00,573 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 111 [2021-11-19 04:24:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:00,578 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2021-11-19 04:24:00,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2021-11-19 04:24:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 04:24:00,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:00,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:00,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:24:00,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash 148499438, now seen corresponding path program 1 times [2021-11-19 04:24:00,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:00,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598626464] [2021-11-19 04:24:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:00,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:00,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:00,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598626464] [2021-11-19 04:24:00,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598626464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:00,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:00,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:00,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793919597] [2021-11-19 04:24:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:00,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:24:00,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:00,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:24:00,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:24:00,880 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:07,798 INFO L93 Difference]: Finished difference Result 5865 states and 8159 transitions. [2021-11-19 04:24:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:24:07,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-19 04:24:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:07,832 INFO L225 Difference]: With dead ends: 5865 [2021-11-19 04:24:07,832 INFO L226 Difference]: Without dead ends: 4026 [2021-11-19 04:24:07,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:24:07,848 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 938 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2907 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 2907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:07,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 440 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 2907 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-19 04:24:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-11-19 04:24:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4020. [2021-11-19 04:24:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4019 states have (on average 1.3264493655138094) internal successors, (5331), 4019 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5331 transitions. [2021-11-19 04:24:08,039 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5331 transitions. Word has length 114 [2021-11-19 04:24:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:08,043 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 5331 transitions. [2021-11-19 04:24:08,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5331 transitions. [2021-11-19 04:24:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 04:24:08,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:08,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:08,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:24:08,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:08,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1947040115, now seen corresponding path program 1 times [2021-11-19 04:24:08,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:08,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316809249] [2021-11-19 04:24:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:08,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 04:24:08,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:08,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316809249] [2021-11-19 04:24:08,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316809249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:08,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:08,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:24:08,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005184663] [2021-11-19 04:24:08,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:08,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:08,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:08,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:08,258 INFO L87 Difference]: Start difference. First operand 4020 states and 5331 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:11,116 INFO L93 Difference]: Finished difference Result 10602 states and 14367 transitions. [2021-11-19 04:24:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-19 04:24:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:11,163 INFO L225 Difference]: With dead ends: 10602 [2021-11-19 04:24:11,164 INFO L226 Difference]: Without dead ends: 6580 [2021-11-19 04:24:11,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:11,172 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:11,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 04:24:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2021-11-19 04:24:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 5301. [2021-11-19 04:24:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5301 states, 5300 states have (on average 1.2269811320754718) internal successors, (6503), 5300 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5301 states to 5301 states and 6503 transitions. [2021-11-19 04:24:11,351 INFO L78 Accepts]: Start accepts. Automaton has 5301 states and 6503 transitions. Word has length 179 [2021-11-19 04:24:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:11,353 INFO L470 AbstractCegarLoop]: Abstraction has 5301 states and 6503 transitions. [2021-11-19 04:24:11,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5301 states and 6503 transitions. [2021-11-19 04:24:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 04:24:11,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:11,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:11,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:24:11,358 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:11,362 INFO L85 PathProgramCache]: Analyzing trace with hash 402637231, now seen corresponding path program 1 times [2021-11-19 04:24:11,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:11,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029242235] [2021-11-19 04:24:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:11,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:11,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:11,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029242235] [2021-11-19 04:24:11,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029242235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:11,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:11,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:24:11,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054648887] [2021-11-19 04:24:11,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:11,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:24:11,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:24:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:24:11,688 INFO L87 Difference]: Start difference. First operand 5301 states and 6503 transitions. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:15,383 INFO L93 Difference]: Finished difference Result 13191 states and 16563 transitions. [2021-11-19 04:24:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:24:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-19 04:24:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:15,445 INFO L225 Difference]: With dead ends: 13191 [2021-11-19 04:24:15,445 INFO L226 Difference]: Without dead ends: 7892 [2021-11-19 04:24:15,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:24:15,455 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1659 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:15,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 834 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 04:24:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7892 states. [2021-11-19 04:24:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7892 to 7858. [2021-11-19 04:24:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 1.2102583683339696) internal successors, (9509), 7857 states have internal predecessors, (9509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 9509 transitions. [2021-11-19 04:24:15,701 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 9509 transitions. Word has length 192 [2021-11-19 04:24:15,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 9509 transitions. [2021-11-19 04:24:15,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 9509 transitions. [2021-11-19 04:24:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-19 04:24:15,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:15,716 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:15,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:24:15,717 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1325173592, now seen corresponding path program 1 times [2021-11-19 04:24:15,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:15,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905802569] [2021-11-19 04:24:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:15,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-19 04:24:16,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:16,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905802569] [2021-11-19 04:24:16,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905802569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:16,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:16,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:16,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474372698] [2021-11-19 04:24:16,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:16,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:16,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:16,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:16,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:16,032 INFO L87 Difference]: Start difference. First operand 7858 states and 9509 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:20,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:20,137 INFO L93 Difference]: Finished difference Result 23005 states and 27850 transitions. [2021-11-19 04:24:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2021-11-19 04:24:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:20,218 INFO L225 Difference]: With dead ends: 23005 [2021-11-19 04:24:20,219 INFO L226 Difference]: Without dead ends: 15149 [2021-11-19 04:24:20,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:20,232 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 463 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:20,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 923 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-19 04:24:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15149 states. [2021-11-19 04:24:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15149 to 12995. [2021-11-19 04:24:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 1.2274126519932276) internal successors, (15949), 12994 states have internal predecessors, (15949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 15949 transitions. [2021-11-19 04:24:20,654 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 15949 transitions. Word has length 296 [2021-11-19 04:24:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:20,655 INFO L470 AbstractCegarLoop]: Abstraction has 12995 states and 15949 transitions. [2021-11-19 04:24:20,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 15949 transitions. [2021-11-19 04:24:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-19 04:24:20,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:20,663 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:20,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:24:20,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash -918027661, now seen corresponding path program 1 times [2021-11-19 04:24:20,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:20,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733240553] [2021-11-19 04:24:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:20,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-19 04:24:20,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:20,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733240553] [2021-11-19 04:24:20,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733240553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:20,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:20,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:20,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736176578] [2021-11-19 04:24:20,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:20,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:20,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:20,896 INFO L87 Difference]: Start difference. First operand 12995 states and 15949 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:24,380 INFO L93 Difference]: Finished difference Result 31501 states and 38602 transitions. [2021-11-19 04:24:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2021-11-19 04:24:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:24,440 INFO L225 Difference]: With dead ends: 31501 [2021-11-19 04:24:24,441 INFO L226 Difference]: Without dead ends: 17658 [2021-11-19 04:24:24,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:24,555 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 400 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:24,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 952 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 04:24:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2021-11-19 04:24:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 12121. [2021-11-19 04:24:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12121 states, 12120 states have (on average 1.1797029702970296) internal successors, (14298), 12120 states have internal predecessors, (14298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12121 states to 12121 states and 14298 transitions. [2021-11-19 04:24:24,921 INFO L78 Accepts]: Start accepts. Automaton has 12121 states and 14298 transitions. Word has length 297 [2021-11-19 04:24:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:24,922 INFO L470 AbstractCegarLoop]: Abstraction has 12121 states and 14298 transitions. [2021-11-19 04:24:24,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 12121 states and 14298 transitions. [2021-11-19 04:24:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-19 04:24:24,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:24,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:24,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:24:24,936 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:24,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:24,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2082452149, now seen corresponding path program 1 times [2021-11-19 04:24:24,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:24,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654953776] [2021-11-19 04:24:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:24,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-19 04:24:25,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:25,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654953776] [2021-11-19 04:24:25,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654953776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:25,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:25,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:25,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822920870] [2021-11-19 04:24:25,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:25,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:25,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:25,165 INFO L87 Difference]: Start difference. First operand 12121 states and 14298 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:28,603 INFO L93 Difference]: Finished difference Result 31045 states and 36681 transitions. [2021-11-19 04:24:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:28,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2021-11-19 04:24:28,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:28,746 INFO L225 Difference]: With dead ends: 31045 [2021-11-19 04:24:28,746 INFO L226 Difference]: Without dead ends: 18926 [2021-11-19 04:24:28,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:28,759 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 449 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:28,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 405 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 04:24:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-11-19 04:24:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 16793. [2021-11-19 04:24:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16793 states, 16792 states have (on average 1.167877560743211) internal successors, (19611), 16792 states have internal predecessors, (19611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16793 states to 16793 states and 19611 transitions. [2021-11-19 04:24:29,075 INFO L78 Accepts]: Start accepts. Automaton has 16793 states and 19611 transitions. Word has length 314 [2021-11-19 04:24:29,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:29,076 INFO L470 AbstractCegarLoop]: Abstraction has 16793 states and 19611 transitions. [2021-11-19 04:24:29,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 16793 states and 19611 transitions. [2021-11-19 04:24:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-19 04:24:29,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:29,089 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:29,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:24:29,091 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2095784456, now seen corresponding path program 1 times [2021-11-19 04:24:29,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:29,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869432983] [2021-11-19 04:24:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:29,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-19 04:24:29,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:29,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869432983] [2021-11-19 04:24:29,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869432983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:29,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:29,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:29,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419770445] [2021-11-19 04:24:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:29,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:29,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:29,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:29,336 INFO L87 Difference]: Start difference. First operand 16793 states and 19611 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:32,659 INFO L93 Difference]: Finished difference Result 41278 states and 48341 transitions. [2021-11-19 04:24:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2021-11-19 04:24:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:32,719 INFO L225 Difference]: With dead ends: 41278 [2021-11-19 04:24:32,719 INFO L226 Difference]: Without dead ends: 23623 [2021-11-19 04:24:32,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:32,738 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 482 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:32,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 801 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 04:24:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23623 states. [2021-11-19 04:24:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23623 to 21064. [2021-11-19 04:24:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21064 states, 21063 states have (on average 1.166595451740018) internal successors, (24572), 21063 states have internal predecessors, (24572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21064 states to 21064 states and 24572 transitions. [2021-11-19 04:24:33,158 INFO L78 Accepts]: Start accepts. Automaton has 21064 states and 24572 transitions. Word has length 358 [2021-11-19 04:24:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:33,159 INFO L470 AbstractCegarLoop]: Abstraction has 21064 states and 24572 transitions. [2021-11-19 04:24:33,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 21064 states and 24572 transitions. [2021-11-19 04:24:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-19 04:24:33,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:33,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:33,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:24:33,175 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:33,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1853233684, now seen corresponding path program 1 times [2021-11-19 04:24:33,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:33,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356113807] [2021-11-19 04:24:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:33,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-19 04:24:33,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:33,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356113807] [2021-11-19 04:24:33,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356113807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:33,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:33,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:24:33,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478111036] [2021-11-19 04:24:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:33,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:24:33,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:24:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:24:33,454 INFO L87 Difference]: Start difference. First operand 21064 states and 24572 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:38,590 INFO L93 Difference]: Finished difference Result 61335 states and 70911 transitions. [2021-11-19 04:24:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:24:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2021-11-19 04:24:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:38,672 INFO L225 Difference]: With dead ends: 61335 [2021-11-19 04:24:38,672 INFO L226 Difference]: Without dead ends: 39848 [2021-11-19 04:24:38,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:24:38,692 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 920 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:38,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 190 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-19 04:24:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-11-19 04:24:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 26634. [2021-11-19 04:24:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26634 states, 26633 states have (on average 1.168475199939924) internal successors, (31120), 26633 states have internal predecessors, (31120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26634 states to 26634 states and 31120 transitions. [2021-11-19 04:24:39,456 INFO L78 Accepts]: Start accepts. Automaton has 26634 states and 31120 transitions. Word has length 366 [2021-11-19 04:24:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:39,457 INFO L470 AbstractCegarLoop]: Abstraction has 26634 states and 31120 transitions. [2021-11-19 04:24:39,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 26634 states and 31120 transitions. [2021-11-19 04:24:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-19 04:24:39,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:39,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:39,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:24:39,471 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash 773910742, now seen corresponding path program 1 times [2021-11-19 04:24:39,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:39,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668188003] [2021-11-19 04:24:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:39,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:24:39,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:39,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668188003] [2021-11-19 04:24:39,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668188003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:39,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:39,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:39,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342565442] [2021-11-19 04:24:39,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:39,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:39,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:39,700 INFO L87 Difference]: Start difference. First operand 26634 states and 31120 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:42,825 INFO L93 Difference]: Finished difference Result 64404 states and 75814 transitions. [2021-11-19 04:24:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2021-11-19 04:24:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:42,890 INFO L225 Difference]: With dead ends: 64404 [2021-11-19 04:24:42,890 INFO L226 Difference]: Without dead ends: 36922 [2021-11-19 04:24:42,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:42,908 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 379 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:42,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 886 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 04:24:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36922 states. [2021-11-19 04:24:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36922 to 36058. [2021-11-19 04:24:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36058 states, 36057 states have (on average 1.145353190781263) internal successors, (41298), 36057 states have internal predecessors, (41298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36058 states to 36058 states and 41298 transitions. [2021-11-19 04:24:43,660 INFO L78 Accepts]: Start accepts. Automaton has 36058 states and 41298 transitions. Word has length 386 [2021-11-19 04:24:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:43,661 INFO L470 AbstractCegarLoop]: Abstraction has 36058 states and 41298 transitions. [2021-11-19 04:24:43,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 36058 states and 41298 transitions. [2021-11-19 04:24:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-19 04:24:43,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:43,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:43,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:24:43,681 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash 92841162, now seen corresponding path program 1 times [2021-11-19 04:24:43,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:43,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492398146] [2021-11-19 04:24:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:43,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 04:24:43,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:43,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492398146] [2021-11-19 04:24:43,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492398146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:43,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:43,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:43,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677912661] [2021-11-19 04:24:43,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:43,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:43,996 INFO L87 Difference]: Start difference. First operand 36058 states and 41298 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:47,280 INFO L93 Difference]: Finished difference Result 82782 states and 94745 transitions. [2021-11-19 04:24:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-11-19 04:24:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:47,358 INFO L225 Difference]: With dead ends: 82782 [2021-11-19 04:24:47,359 INFO L226 Difference]: Without dead ends: 45438 [2021-11-19 04:24:47,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:47,384 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 320 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:47,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 746 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 04:24:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45438 states. [2021-11-19 04:24:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45438 to 36049. [2021-11-19 04:24:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36049 states, 36048 states have (on average 1.1423102529960054) internal successors, (41178), 36048 states have internal predecessors, (41178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36049 states to 36049 states and 41178 transitions. [2021-11-19 04:24:48,111 INFO L78 Accepts]: Start accepts. Automaton has 36049 states and 41178 transitions. Word has length 433 [2021-11-19 04:24:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:48,112 INFO L470 AbstractCegarLoop]: Abstraction has 36049 states and 41178 transitions. [2021-11-19 04:24:48,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 36049 states and 41178 transitions. [2021-11-19 04:24:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-11-19 04:24:48,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:48,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:24:48,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash 470334227, now seen corresponding path program 1 times [2021-11-19 04:24:48,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:48,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097056851] [2021-11-19 04:24:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:48,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 04:24:48,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:48,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097056851] [2021-11-19 04:24:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097056851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:48,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:48,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:24:48,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777056043] [2021-11-19 04:24:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:48,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:24:48,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:24:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:24:48,737 INFO L87 Difference]: Start difference. First operand 36049 states and 41178 transitions. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:54,154 INFO L93 Difference]: Finished difference Result 106198 states and 120766 transitions. [2021-11-19 04:24:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:24:54,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 449 [2021-11-19 04:24:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:54,247 INFO L225 Difference]: With dead ends: 106198 [2021-11-19 04:24:54,247 INFO L226 Difference]: Without dead ends: 69726 [2021-11-19 04:24:54,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:24:54,272 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 783 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:54,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 187 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 04:24:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69726 states. [2021-11-19 04:24:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69726 to 60287. [2021-11-19 04:24:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60287 states, 60286 states have (on average 1.1287695318979531) internal successors, (68049), 60286 states have internal predecessors, (68049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60287 states to 60287 states and 68049 transitions. [2021-11-19 04:24:55,433 INFO L78 Accepts]: Start accepts. Automaton has 60287 states and 68049 transitions. Word has length 449 [2021-11-19 04:24:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:55,434 INFO L470 AbstractCegarLoop]: Abstraction has 60287 states and 68049 transitions. [2021-11-19 04:24:55,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 60287 states and 68049 transitions. [2021-11-19 04:24:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-11-19 04:24:55,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:55,458 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:55,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:24:55,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash -987294033, now seen corresponding path program 1 times [2021-11-19 04:24:55,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:55,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064168999] [2021-11-19 04:24:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:55,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 551 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-19 04:24:56,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:56,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064168999] [2021-11-19 04:24:56,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064168999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:56,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:56,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:24:56,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868834292] [2021-11-19 04:24:56,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:56,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:24:56,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:56,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:24:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:56,028 INFO L87 Difference]: Start difference. First operand 60287 states and 68049 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:59,748 INFO L93 Difference]: Finished difference Result 141000 states and 159171 transitions. [2021-11-19 04:24:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:24:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2021-11-19 04:24:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:59,867 INFO L225 Difference]: With dead ends: 141000 [2021-11-19 04:24:59,867 INFO L226 Difference]: Without dead ends: 79423 [2021-11-19 04:24:59,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:24:59,909 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 445 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:59,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 649 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 04:24:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79423 states. [2021-11-19 04:25:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79423 to 73450. [2021-11-19 04:25:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73450 states, 73449 states have (on average 1.1131124998298139) internal successors, (81757), 73449 states have internal predecessors, (81757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73450 states to 73450 states and 81757 transitions. [2021-11-19 04:25:01,481 INFO L78 Accepts]: Start accepts. Automaton has 73450 states and 81757 transitions. Word has length 468 [2021-11-19 04:25:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:01,482 INFO L470 AbstractCegarLoop]: Abstraction has 73450 states and 81757 transitions. [2021-11-19 04:25:01,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 73450 states and 81757 transitions. [2021-11-19 04:25:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2021-11-19 04:25:01,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:01,529 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:01,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:25:01,530 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:01,531 INFO L85 PathProgramCache]: Analyzing trace with hash -841867674, now seen corresponding path program 1 times [2021-11-19 04:25:01,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:01,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467845655] [2021-11-19 04:25:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:01,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-19 04:25:01,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:01,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467845655] [2021-11-19 04:25:01,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467845655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:01,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:01,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:25:01,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845627016] [2021-11-19 04:25:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:01,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:01,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:01,855 INFO L87 Difference]: Start difference. First operand 73450 states and 81757 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:07,011 INFO L93 Difference]: Finished difference Result 184847 states and 205031 transitions. [2021-11-19 04:25:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:07,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 472 [2021-11-19 04:25:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:07,195 INFO L225 Difference]: With dead ends: 184847 [2021-11-19 04:25:07,196 INFO L226 Difference]: Without dead ends: 110974 [2021-11-19 04:25:07,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:07,230 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 812 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:07,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 177 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 04:25:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110974 states. [2021-11-19 04:25:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110974 to 102446. [2021-11-19 04:25:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102446 states, 102445 states have (on average 1.1084874810874128) internal successors, (113559), 102445 states have internal predecessors, (113559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102446 states to 102446 states and 113559 transitions. [2021-11-19 04:25:09,196 INFO L78 Accepts]: Start accepts. Automaton has 102446 states and 113559 transitions. Word has length 472 [2021-11-19 04:25:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:09,197 INFO L470 AbstractCegarLoop]: Abstraction has 102446 states and 113559 transitions. [2021-11-19 04:25:09,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 102446 states and 113559 transitions. [2021-11-19 04:25:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-11-19 04:25:09,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:09,577 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:09,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:25:09,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1146238285, now seen corresponding path program 1 times [2021-11-19 04:25:09,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:09,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945312652] [2021-11-19 04:25:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:09,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-19 04:25:10,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:10,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945312652] [2021-11-19 04:25:10,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945312652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:10,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:10,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:25:10,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470264904] [2021-11-19 04:25:10,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:10,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:10,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:10,059 INFO L87 Difference]: Start difference. First operand 102446 states and 113559 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:15,114 INFO L93 Difference]: Finished difference Result 231729 states and 256394 transitions. [2021-11-19 04:25:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 492 [2021-11-19 04:25:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:15,292 INFO L225 Difference]: With dead ends: 231729 [2021-11-19 04:25:15,293 INFO L226 Difference]: Without dead ends: 128008 [2021-11-19 04:25:15,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:15,345 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 807 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:15,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 208 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 04:25:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128008 states. [2021-11-19 04:25:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128008 to 101163. [2021-11-19 04:25:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101163 states, 101162 states have (on average 1.1060279551610288) internal successors, (111888), 101162 states have internal predecessors, (111888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101163 states to 101163 states and 111888 transitions. [2021-11-19 04:25:17,761 INFO L78 Accepts]: Start accepts. Automaton has 101163 states and 111888 transitions. Word has length 492 [2021-11-19 04:25:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:17,762 INFO L470 AbstractCegarLoop]: Abstraction has 101163 states and 111888 transitions. [2021-11-19 04:25:17,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 101163 states and 111888 transitions. [2021-11-19 04:25:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-11-19 04:25:17,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:17,781 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:17,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:25:17,781 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash -280854508, now seen corresponding path program 1 times [2021-11-19 04:25:17,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:17,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138661535] [2021-11-19 04:25:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:17,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:25:18,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:18,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138661535] [2021-11-19 04:25:18,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138661535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:18,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:18,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:25:18,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827068858] [2021-11-19 04:25:18,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:18,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:18,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:18,059 INFO L87 Difference]: Start difference. First operand 101163 states and 111888 transitions. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:23,551 INFO L93 Difference]: Finished difference Result 237301 states and 263341 transitions. [2021-11-19 04:25:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 512 [2021-11-19 04:25:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:23,755 INFO L225 Difference]: With dead ends: 237301 [2021-11-19 04:25:23,755 INFO L226 Difference]: Without dead ends: 136140 [2021-11-19 04:25:23,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:23,803 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 825 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:23,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 209 Invalid, 2763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 04:25:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136140 states. [2021-11-19 04:25:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136140 to 126769. [2021-11-19 04:25:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126769 states, 126768 states have (on average 1.1143111826328411) internal successors, (141259), 126768 states have internal predecessors, (141259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126769 states to 126769 states and 141259 transitions. [2021-11-19 04:25:26,614 INFO L78 Accepts]: Start accepts. Automaton has 126769 states and 141259 transitions. Word has length 512 [2021-11-19 04:25:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:26,615 INFO L470 AbstractCegarLoop]: Abstraction has 126769 states and 141259 transitions. [2021-11-19 04:25:26,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 126769 states and 141259 transitions. [2021-11-19 04:25:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2021-11-19 04:25:26,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:26,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:26,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:25:26,636 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1255111598, now seen corresponding path program 1 times [2021-11-19 04:25:26,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:26,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708095877] [2021-11-19 04:25:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:26,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 590 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-19 04:25:26,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:26,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708095877] [2021-11-19 04:25:26,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708095877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:26,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:26,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:26,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749707852] [2021-11-19 04:25:26,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:26,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:25:26,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:25:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:25:26,895 INFO L87 Difference]: Start difference. First operand 126769 states and 141259 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:31,109 INFO L93 Difference]: Finished difference Result 282461 states and 315838 transitions. [2021-11-19 04:25:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:25:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 531 [2021-11-19 04:25:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:31,341 INFO L225 Difference]: With dead ends: 282461 [2021-11-19 04:25:31,341 INFO L226 Difference]: Without dead ends: 155694 [2021-11-19 04:25:31,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:25:31,403 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 392 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:31,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 312 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 04:25:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155694 states. [2021-11-19 04:25:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155694 to 153981. [2021-11-19 04:25:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153981 states, 153980 states have (on average 1.1081828808936225) internal successors, (170638), 153980 states have internal predecessors, (170638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153981 states to 153981 states and 170638 transitions. [2021-11-19 04:25:35,342 INFO L78 Accepts]: Start accepts. Automaton has 153981 states and 170638 transitions. Word has length 531 [2021-11-19 04:25:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:35,343 INFO L470 AbstractCegarLoop]: Abstraction has 153981 states and 170638 transitions. [2021-11-19 04:25:35,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 153981 states and 170638 transitions. [2021-11-19 04:25:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-19 04:25:35,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:35,366 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:35,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:25:35,366 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:35,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1230945378, now seen corresponding path program 1 times [2021-11-19 04:25:35,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:35,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976669300] [2021-11-19 04:25:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:35,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-19 04:25:35,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:35,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976669300] [2021-11-19 04:25:35,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976669300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:35,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:35,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:25:35,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116500958] [2021-11-19 04:25:35,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:35,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:35,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:35,974 INFO L87 Difference]: Start difference. First operand 153981 states and 170638 transitions. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:41,647 INFO L93 Difference]: Finished difference Result 334784 states and 370572 transitions. [2021-11-19 04:25:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 532 [2021-11-19 04:25:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:41,911 INFO L225 Difference]: With dead ends: 334784 [2021-11-19 04:25:41,911 INFO L226 Difference]: Without dead ends: 180379 [2021-11-19 04:25:41,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:41,965 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 765 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:41,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 248 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-19 04:25:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180379 states. [2021-11-19 04:25:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180379 to 145450. [2021-11-19 04:25:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145450 states, 145449 states have (on average 1.1063534297245083) internal successors, (160918), 145449 states have internal predecessors, (160918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145450 states to 145450 states and 160918 transitions. [2021-11-19 04:25:45,346 INFO L78 Accepts]: Start accepts. Automaton has 145450 states and 160918 transitions. Word has length 532 [2021-11-19 04:25:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:45,346 INFO L470 AbstractCegarLoop]: Abstraction has 145450 states and 160918 transitions. [2021-11-19 04:25:45,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 145450 states and 160918 transitions. [2021-11-19 04:25:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2021-11-19 04:25:45,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:45,368 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:45,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:25:45,369 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1462463037, now seen corresponding path program 1 times [2021-11-19 04:25:45,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:45,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740011426] [2021-11-19 04:25:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:45,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-19 04:25:45,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:45,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740011426] [2021-11-19 04:25:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740011426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:45,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:45,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:25:45,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374736195] [2021-11-19 04:25:45,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:45,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:25:45,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:25:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:25:45,683 INFO L87 Difference]: Start difference. First operand 145450 states and 160918 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:48,777 INFO L93 Difference]: Finished difference Result 286205 states and 316338 transitions. [2021-11-19 04:25:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:25:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 544 [2021-11-19 04:25:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:48,979 INFO L225 Difference]: With dead ends: 286205 [2021-11-19 04:25:48,979 INFO L226 Difference]: Without dead ends: 140757 [2021-11-19 04:25:49,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:25:49,043 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 625 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:49,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 107 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 04:25:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140757 states. [2021-11-19 04:25:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140757 to 136913. [2021-11-19 04:25:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136913 states, 136912 states have (on average 1.105286607455884) internal successors, (151327), 136912 states have internal predecessors, (151327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136913 states to 136913 states and 151327 transitions. [2021-11-19 04:25:52,093 INFO L78 Accepts]: Start accepts. Automaton has 136913 states and 151327 transitions. Word has length 544 [2021-11-19 04:25:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:52,093 INFO L470 AbstractCegarLoop]: Abstraction has 136913 states and 151327 transitions. [2021-11-19 04:25:52,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 136913 states and 151327 transitions. [2021-11-19 04:25:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2021-11-19 04:25:52,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:52,116 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:52,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:25:52,117 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1977964801, now seen corresponding path program 1 times [2021-11-19 04:25:52,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:52,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056515248] [2021-11-19 04:25:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:52,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-19 04:25:52,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:52,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056515248] [2021-11-19 04:25:52,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056515248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:52,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:52,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:25:52,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838874056] [2021-11-19 04:25:52,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:52,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:52,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:52,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:52,432 INFO L87 Difference]: Start difference. First operand 136913 states and 151327 transitions. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:58,349 INFO L93 Difference]: Finished difference Result 292101 states and 321914 transitions. [2021-11-19 04:25:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 544 [2021-11-19 04:25:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:58,588 INFO L225 Difference]: With dead ends: 292101 [2021-11-19 04:25:58,588 INFO L226 Difference]: Without dead ends: 155189 [2021-11-19 04:25:58,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:58,666 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 767 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2899 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:58,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 392 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2899 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 04:25:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155189 states.