./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product10.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product10.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G --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 ac360da941eb2bc713d1cdb41b6939d6a50ea394a41fda87a7330709a6b33058 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:05:52,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:05:52,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:05:52,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:05:52,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:05:52,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:05:52,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:05:52,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:05:52,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:05:52,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:05:52,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:05:52,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:05:52,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:05:52,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:05:52,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:05:52,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:05:52,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:05:52,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:05:52,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:05:52,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:05:52,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:05:52,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:05:52,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:05:52,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:05:52,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:05:52,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:05:52,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:05:52,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:05:52,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:05:52,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:05:52,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:05:52,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:05:52,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:05:52,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:05:52,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:05:52,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:05:52,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:05:52,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:05:52,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:05:52,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:05:52,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:05:52,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:05:52,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:05:52,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:05:52,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:05:52,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:05:52,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:05:52,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:05:52,751 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:05:52,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:05:52,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:05:52,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:05:52,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:05:52,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:05:52,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:05:52,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:05:52,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:05:52,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:05:52,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:05:52,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:05:52,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:05:52,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:05:52,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:05:52,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:05:52,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:05:52,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:05:52,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:05:52,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:05:52,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:05:52,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:05:52,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:05:52,757 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:05:52,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:05:52,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:05:52,758 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_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac360da941eb2bc713d1cdb41b6939d6a50ea394a41fda87a7330709a6b33058 [2021-11-23 14:05:53,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:05:53,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:05:53,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:05:53,047 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:05:53,048 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:05:53,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/product-lines/email_spec0_product10.cil.c [2021-11-23 14:05:53,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/data/6110d6e8d/8c7f9720739a4eabae37e7932406b337/FLAG381d2cb66 [2021-11-23 14:05:53,716 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:05:53,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c [2021-11-23 14:05:53,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/data/6110d6e8d/8c7f9720739a4eabae37e7932406b337/FLAG381d2cb66 [2021-11-23 14:05:54,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/data/6110d6e8d/8c7f9720739a4eabae37e7932406b337 [2021-11-23 14:05:54,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:05:54,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:05:54,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:05:54,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:05:54,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:05:54,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:54,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e742b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54, skipping insertion in model container [2021-11-23 14:05:54,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:54,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:05:54,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:05:54,415 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_bc581b82-9118-487f-8c3e-4ee094f0c799/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c[2842,2855] [2021-11-23 14:05:54,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:05:54,818 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:05:54,834 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_bc581b82-9118-487f-8c3e-4ee094f0c799/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c[2842,2855] [2021-11-23 14:05:54,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:05:54,975 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:05:54,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54 WrapperNode [2021-11-23 14:05:54,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:05:54,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:05:54,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:05:54,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:05:54,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,075 INFO L137 Inliner]: procedures = 110, calls = 135, calls flagged for inlining = 62, calls inlined = 77, statements flattened = 1077 [2021-11-23 14:05:55,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:05:55,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:05:55,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:05:55,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:05:55,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:05:55,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:05:55,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:05:55,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:05:55,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (1/1) ... [2021-11-23 14:05:55,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:05:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:05:55,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:05:55,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:05:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 14:05:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:05:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:05:55,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:05:55,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:05:55,518 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:05:55,520 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:05:56,246 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:05:56,255 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:05:56,255 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:05:56,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:56 BoogieIcfgContainer [2021-11-23 14:05:56,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:05:56,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:05:56,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:05:56,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:05:56,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:05:54" (1/3) ... [2021-11-23 14:05:56,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259ebb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:56, skipping insertion in model container [2021-11-23 14:05:56,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:54" (2/3) ... [2021-11-23 14:05:56,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259ebb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:56, skipping insertion in model container [2021-11-23 14:05:56,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:56" (3/3) ... [2021-11-23 14:05:56,267 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product10.cil.c [2021-11-23 14:05:56,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:05:56,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 14:05:56,320 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:05:56,327 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 [2021-11-23 14:05:56,327 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 14:05:56,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 188 states, 185 states have (on average 1.5621621621621622) internal successors, (289), 187 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:56,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 14:05:56,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:56,369 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] [2021-11-23 14:05:56,370 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1062550804, now seen corresponding path program 1 times [2021-11-23 14:05:56,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:56,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248028401] [2021-11-23 14:05:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:56,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:56,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:56,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248028401] [2021-11-23 14:05:56,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248028401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:56,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:56,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:56,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078092520] [2021-11-23 14:05:56,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:56,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:56,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:56,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:56,682 INFO L87 Difference]: Start difference. First operand has 188 states, 185 states have (on average 1.5621621621621622) internal successors, (289), 187 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:56,844 INFO L93 Difference]: Finished difference Result 529 states and 815 transitions. [2021-11-23 14:05:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 14:05:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:56,861 INFO L225 Difference]: With dead ends: 529 [2021-11-23 14:05:56,861 INFO L226 Difference]: Without dead ends: 308 [2021-11-23 14:05:56,865 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 [2021-11-23 14:05:56,869 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 258 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:56,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 794 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-23 14:05:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 162. [2021-11-23 14:05:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.54375) internal successors, (247), 161 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 247 transitions. [2021-11-23 14:05:56,920 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 247 transitions. Word has length 43 [2021-11-23 14:05:56,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:56,921 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 247 transitions. [2021-11-23 14:05:56,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 247 transitions. [2021-11-23 14:05:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 14:05:56,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:56,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:56,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:05:56,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1920999243, now seen corresponding path program 1 times [2021-11-23 14:05:56,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:56,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383229981] [2021-11-23 14:05:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:56,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:57,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:57,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383229981] [2021-11-23 14:05:57,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383229981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:57,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:57,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:57,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014610587] [2021-11-23 14:05:57,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:57,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:57,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:57,091 INFO L87 Difference]: Start difference. First operand 162 states and 247 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:57,156 INFO L93 Difference]: Finished difference Result 308 states and 472 transitions. [2021-11-23 14:05:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-23 14:05:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:57,163 INFO L225 Difference]: With dead ends: 308 [2021-11-23 14:05:57,165 INFO L226 Difference]: Without dead ends: 164 [2021-11-23 14:05:57,166 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 [2021-11-23 14:05:57,170 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 227 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:57,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 250 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-23 14:05:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-11-23 14:05:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.525) internal successors, (244), 161 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 244 transitions. [2021-11-23 14:05:57,209 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 244 transitions. Word has length 45 [2021-11-23 14:05:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:57,209 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 244 transitions. [2021-11-23 14:05:57,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 244 transitions. [2021-11-23 14:05:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 14:05:57,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:57,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:57,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:05:57,217 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1576063792, now seen corresponding path program 1 times [2021-11-23 14:05:57,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:57,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301776238] [2021-11-23 14:05:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:57,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:57,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:57,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301776238] [2021-11-23 14:05:57,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301776238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:57,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:57,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:57,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327359512] [2021-11-23 14:05:57,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:57,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:57,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:57,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:57,344 INFO L87 Difference]: Start difference. First operand 162 states and 244 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:57,382 INFO L93 Difference]: Finished difference Result 271 states and 404 transitions. [2021-11-23 14:05:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:57,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 14:05:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:57,385 INFO L225 Difference]: With dead ends: 271 [2021-11-23 14:05:57,385 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 14:05:57,386 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 [2021-11-23 14:05:57,388 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 1 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:57,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 482 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 14:05:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-11-23 14:05:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.5185185185185186) internal successors, (246), 163 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 246 transitions. [2021-11-23 14:05:57,404 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 246 transitions. Word has length 47 [2021-11-23 14:05:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:57,405 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 246 transitions. [2021-11-23 14:05:57,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 246 transitions. [2021-11-23 14:05:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 14:05:57,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:57,408 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:57,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:05:57,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash 25137815, now seen corresponding path program 1 times [2021-11-23 14:05:57,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:57,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399759286] [2021-11-23 14:05:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:57,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:57,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399759286] [2021-11-23 14:05:57,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399759286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:05:57,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417827081] [2021-11-23 14:05:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:57,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:05:57,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:05:57,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:05:57,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:05:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:57,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 14:05:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:05:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:57,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:05:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:58,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417827081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:05:58,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:05:58,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 14:05:58,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468625654] [2021-11-23 14:05:58,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:05:58,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 14:05:58,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 14:05:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:05:58,113 INFO L87 Difference]: Start difference. First operand 164 states and 246 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:58,192 INFO L93 Difference]: Finished difference Result 693 states and 1062 transitions. [2021-11-23 14:05:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:05:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 14:05:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:58,204 INFO L225 Difference]: With dead ends: 693 [2021-11-23 14:05:58,204 INFO L226 Difference]: Without dead ends: 587 [2021-11-23 14:05:58,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:05:58,217 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 864 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:58,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 1312 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-23 14:05:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 269. [2021-11-23 14:05:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.6292134831460674) internal successors, (435), 268 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 435 transitions. [2021-11-23 14:05:58,253 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 435 transitions. Word has length 52 [2021-11-23 14:05:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:58,253 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 435 transitions. [2021-11-23 14:05:58,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 435 transitions. [2021-11-23 14:05:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 14:05:58,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:58,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:58,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:05:58,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc581b82-9118-487f-8c3e-4ee094f0c799/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-23 14:05:58,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash 940560341, now seen corresponding path program 1 times [2021-11-23 14:05:58,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:58,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051026301] [2021-11-23 14:05:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:58,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:58,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:58,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051026301] [2021-11-23 14:05:58,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051026301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:58,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:58,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:58,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775981487] [2021-11-23 14:05:58,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:58,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:58,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:58,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:58,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:58,562 INFO L87 Difference]: Start difference. First operand 269 states and 435 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:58,622 INFO L93 Difference]: Finished difference Result 722 states and 1181 transitions. [2021-11-23 14:05:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:58,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 14:05:58,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:58,630 INFO L225 Difference]: With dead ends: 722 [2021-11-23 14:05:58,630 INFO L226 Difference]: Without dead ends: 479 [2021-11-23 14:05:58,632 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 [2021-11-23 14:05:58,637 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 215 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:58,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 483 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-23 14:05:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 373. [2021-11-23 14:05:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 371 states have (on average 1.6630727762803235) internal successors, (617), 372 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 617 transitions. [2021-11-23 14:05:58,690 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 617 transitions. Word has length 59 [2021-11-23 14:05:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:58,691 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 617 transitions. [2021-11-23 14:05:58,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 617 transitions. [2021-11-23 14:05:58,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 14:05:58,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:58,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:58,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:05:58,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:58,702 INFO L85 PathProgramCache]: Analyzing trace with hash 890940079, now seen corresponding path program 1 times [2021-11-23 14:05:58,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:58,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190879031] [2021-11-23 14:05:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:58,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:58,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:58,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190879031] [2021-11-23 14:05:58,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190879031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:58,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:58,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:58,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517724308] [2021-11-23 14:05:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:58,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:58,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:58,787 INFO L87 Difference]: Start difference. First operand 373 states and 617 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:58,834 INFO L93 Difference]: Finished difference Result 955 states and 1595 transitions. [2021-11-23 14:05:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 14:05:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:58,841 INFO L225 Difference]: With dead ends: 955 [2021-11-23 14:05:58,842 INFO L226 Difference]: Without dead ends: 626 [2021-11-23 14:05:58,844 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 [2021-11-23 14:05:58,846 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 213 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:58,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 474 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-23 14:05:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 520. [2021-11-23 14:05:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 518 states have (on average 1.6872586872586872) internal successors, (874), 519 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 874 transitions. [2021-11-23 14:05:58,880 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 874 transitions. Word has length 60 [2021-11-23 14:05:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:58,882 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 874 transitions. [2021-11-23 14:05:58,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 874 transitions. [2021-11-23 14:05:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 14:05:58,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:58,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:58,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 14:05:58,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:58,887 INFO L85 PathProgramCache]: Analyzing trace with hash 282668919, now seen corresponding path program 1 times [2021-11-23 14:05:58,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:58,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654177262] [2021-11-23 14:05:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:58,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:58,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654177262] [2021-11-23 14:05:58,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654177262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:58,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:58,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:58,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705175955] [2021-11-23 14:05:58,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:58,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:58,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:58,972 INFO L87 Difference]: Start difference. First operand 520 states and 874 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:59,028 INFO L93 Difference]: Finished difference Result 1342 states and 2270 transitions. [2021-11-23 14:05:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 14:05:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:59,035 INFO L225 Difference]: With dead ends: 1342 [2021-11-23 14:05:59,035 INFO L226 Difference]: Without dead ends: 885 [2021-11-23 14:05:59,037 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 [2021-11-23 14:05:59,037 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 211 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:59,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-23 14:05:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 779. [2021-11-23 14:05:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 777 states have (on average 1.6936936936936937) internal successors, (1316), 778 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1316 transitions. [2021-11-23 14:05:59,098 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1316 transitions. Word has length 61 [2021-11-23 14:05:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:59,099 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1316 transitions. [2021-11-23 14:05:59,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1316 transitions. [2021-11-23 14:05:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 14:05:59,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:59,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:59,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 14:05:59,102 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash -864636639, now seen corresponding path program 1 times [2021-11-23 14:05:59,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:59,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220304449] [2021-11-23 14:05:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:59,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:59,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:59,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220304449] [2021-11-23 14:05:59,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220304449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:59,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:59,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:59,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222762581] [2021-11-23 14:05:59,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:59,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:59,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:59,168 INFO L87 Difference]: Start difference. First operand 779 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:59,261 INFO L93 Difference]: Finished difference Result 1969 states and 3348 transitions. [2021-11-23 14:05:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-23 14:05:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:59,271 INFO L225 Difference]: With dead ends: 1969 [2021-11-23 14:05:59,271 INFO L226 Difference]: Without dead ends: 1301 [2021-11-23 14:05:59,273 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 [2021-11-23 14:05:59,274 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 209 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:59,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-11-23 14:05:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1195. [2021-11-23 14:05:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1193 states have (on average 1.6906957250628667) internal successors, (2017), 1194 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2017 transitions. [2021-11-23 14:05:59,383 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2017 transitions. Word has length 62 [2021-11-23 14:05:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:59,384 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 2017 transitions. [2021-11-23 14:05:59,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2017 transitions. [2021-11-23 14:05:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 14:05:59,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:59,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:59,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 14:05:59,388 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1058085273, now seen corresponding path program 1 times [2021-11-23 14:05:59,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:59,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729033592] [2021-11-23 14:05:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:59,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:59,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729033592] [2021-11-23 14:05:59,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729033592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:59,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:59,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:59,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180134430] [2021-11-23 14:05:59,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:59,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:59,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:59,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:59,459 INFO L87 Difference]: Start difference. First operand 1195 states and 2017 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:05:59,590 INFO L93 Difference]: Finished difference Result 2994 states and 5093 transitions. [2021-11-23 14:05:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:05:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 14:05:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:05:59,607 INFO L225 Difference]: With dead ends: 2994 [2021-11-23 14:05:59,607 INFO L226 Difference]: Without dead ends: 1990 [2021-11-23 14:05:59,610 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 [2021-11-23 14:05:59,612 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 207 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:05:59,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:05:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-11-23 14:05:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1884. [2021-11-23 14:05:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1882 states have (on average 1.6833156216790648) internal successors, (3168), 1883 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3168 transitions. [2021-11-23 14:05:59,811 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3168 transitions. Word has length 63 [2021-11-23 14:05:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:05:59,812 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 3168 transitions. [2021-11-23 14:05:59,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:05:59,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3168 transitions. [2021-11-23 14:05:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 14:05:59,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:05:59,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:05:59,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 14:05:59,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:05:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:05:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1998526721, now seen corresponding path program 1 times [2021-11-23 14:05:59,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:05:59,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798036820] [2021-11-23 14:05:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:05:59,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:05:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:05:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:05:59,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:05:59,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798036820] [2021-11-23 14:05:59,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798036820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:05:59,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:05:59,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:05:59,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40927572] [2021-11-23 14:05:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:05:59,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:05:59,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:05:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:05:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:05:59,871 INFO L87 Difference]: Start difference. First operand 1884 states and 3168 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:00,067 INFO L93 Difference]: Finished difference Result 4476 states and 7620 transitions. [2021-11-23 14:06:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:06:00,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 14:06:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:00,086 INFO L225 Difference]: With dead ends: 4476 [2021-11-23 14:06:00,086 INFO L226 Difference]: Without dead ends: 2983 [2021-11-23 14:06:00,089 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 [2021-11-23 14:06:00,089 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 205 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:00,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 474 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-11-23 14:06:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2877. [2021-11-23 14:06:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2875 states have (on average 1.679304347826087) internal successors, (4828), 2876 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 4828 transitions. [2021-11-23 14:06:00,328 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 4828 transitions. Word has length 64 [2021-11-23 14:06:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:00,328 INFO L470 AbstractCegarLoop]: Abstraction has 2877 states and 4828 transitions. [2021-11-23 14:06:00,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 4828 transitions. [2021-11-23 14:06:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 14:06:00,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:00,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:00,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 14:06:00,341 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash 979258299, now seen corresponding path program 1 times [2021-11-23 14:06:00,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:00,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043432711] [2021-11-23 14:06:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:00,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:00,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:00,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043432711] [2021-11-23 14:06:00,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043432711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:00,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:00,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:06:00,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815096241] [2021-11-23 14:06:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:00,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:06:00,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:06:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:06:00,400 INFO L87 Difference]: Start difference. First operand 2877 states and 4828 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:00,678 INFO L93 Difference]: Finished difference Result 7265 states and 12320 transitions. [2021-11-23 14:06:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:06:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 14:06:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:00,712 INFO L225 Difference]: With dead ends: 7265 [2021-11-23 14:06:00,712 INFO L226 Difference]: Without dead ends: 4947 [2021-11-23 14:06:00,716 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 [2021-11-23 14:06:00,717 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 203 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:00,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-11-23 14:06:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 4841. [2021-11-23 14:06:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 4839 states have (on average 1.6689398636081836) internal successors, (8076), 4840 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 8076 transitions. [2021-11-23 14:06:01,079 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 8076 transitions. Word has length 65 [2021-11-23 14:06:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:01,079 INFO L470 AbstractCegarLoop]: Abstraction has 4841 states and 8076 transitions. [2021-11-23 14:06:01,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 8076 transitions. [2021-11-23 14:06:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 14:06:01,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:01,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:01,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 14:06:01,088 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash -155355919, now seen corresponding path program 1 times [2021-11-23 14:06:01,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940427402] [2021-11-23 14:06:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:01,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:01,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940427402] [2021-11-23 14:06:01,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940427402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:01,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:01,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:06:01,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97702250] [2021-11-23 14:06:01,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:06:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:06:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:06:01,133 INFO L87 Difference]: Start difference. First operand 4841 states and 8076 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:01,567 INFO L93 Difference]: Finished difference Result 12586 states and 21188 transitions. [2021-11-23 14:06:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:06:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 14:06:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:01,643 INFO L225 Difference]: With dead ends: 12586 [2021-11-23 14:06:01,643 INFO L226 Difference]: Without dead ends: 8558 [2021-11-23 14:06:01,650 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 [2021-11-23 14:06:01,651 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 201 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:01,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8558 states. [2021-11-23 14:06:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8558 to 8452. [2021-11-23 14:06:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8452 states, 8450 states have (on average 1.6566863905325444) internal successors, (13999), 8451 states have internal predecessors, (13999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8452 states to 8452 states and 13999 transitions. [2021-11-23 14:06:02,213 INFO L78 Accepts]: Start accepts. Automaton has 8452 states and 13999 transitions. Word has length 66 [2021-11-23 14:06:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:02,213 INFO L470 AbstractCegarLoop]: Abstraction has 8452 states and 13999 transitions. [2021-11-23 14:06:02,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8452 states and 13999 transitions. [2021-11-23 14:06:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 14:06:02,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:02,226 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:02,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 14:06:02,227 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1013902320, now seen corresponding path program 2 times [2021-11-23 14:06:02,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:02,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317809072] [2021-11-23 14:06:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:02,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 14:06:02,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317809072] [2021-11-23 14:06:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317809072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:02,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:02,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:06:02,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533906030] [2021-11-23 14:06:02,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:02,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:06:02,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:06:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:06:02,282 INFO L87 Difference]: Start difference. First operand 8452 states and 13999 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:02,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:02,762 INFO L93 Difference]: Finished difference Result 15722 states and 26171 transitions. [2021-11-23 14:06:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:06:02,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 14:06:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:02,787 INFO L225 Difference]: With dead ends: 15722 [2021-11-23 14:06:02,787 INFO L226 Difference]: Without dead ends: 8558 [2021-11-23 14:06:02,798 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 [2021-11-23 14:06:02,799 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 214 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:02,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 698 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8558 states. [2021-11-23 14:06:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8558 to 8452. [2021-11-23 14:06:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8452 states, 8450 states have (on average 1.6404733727810652) internal successors, (13862), 8451 states have internal predecessors, (13862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8452 states to 8452 states and 13862 transitions. [2021-11-23 14:06:03,302 INFO L78 Accepts]: Start accepts. Automaton has 8452 states and 13862 transitions. Word has length 67 [2021-11-23 14:06:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:03,302 INFO L470 AbstractCegarLoop]: Abstraction has 8452 states and 13862 transitions. [2021-11-23 14:06:03,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8452 states and 13862 transitions. [2021-11-23 14:06:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 14:06:03,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:03,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:03,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 14:06:03,314 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1742935971, now seen corresponding path program 1 times [2021-11-23 14:06:03,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:03,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751661695] [2021-11-23 14:06:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:03,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:03,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:03,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751661695] [2021-11-23 14:06:03,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751661695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:03,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:03,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:06:03,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446182667] [2021-11-23 14:06:03,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:03,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:06:03,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:06:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:06:03,366 INFO L87 Difference]: Start difference. First operand 8452 states and 13862 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:04,050 INFO L93 Difference]: Finished difference Result 22670 states and 37408 transitions. [2021-11-23 14:06:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:06:04,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 14:06:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:04,100 INFO L225 Difference]: With dead ends: 22670 [2021-11-23 14:06:04,100 INFO L226 Difference]: Without dead ends: 15354 [2021-11-23 14:06:04,114 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 [2021-11-23 14:06:04,115 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 199 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:04,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15354 states. [2021-11-23 14:06:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15354 to 15248. [2021-11-23 14:06:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15248 states, 15246 states have (on average 1.6241637150728059) internal successors, (24762), 15247 states have internal predecessors, (24762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15248 states to 15248 states and 24762 transitions. [2021-11-23 14:06:04,965 INFO L78 Accepts]: Start accepts. Automaton has 15248 states and 24762 transitions. Word has length 67 [2021-11-23 14:06:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:04,965 INFO L470 AbstractCegarLoop]: Abstraction has 15248 states and 24762 transitions. [2021-11-23 14:06:04,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 15248 states and 24762 transitions. [2021-11-23 14:06:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 14:06:04,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:04,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:04,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 14:06:04,981 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:04,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1387997263, now seen corresponding path program 1 times [2021-11-23 14:06:04,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:04,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586931800] [2021-11-23 14:06:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:04,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:05,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:05,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586931800] [2021-11-23 14:06:05,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586931800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:05,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:05,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:06:05,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374823098] [2021-11-23 14:06:05,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:05,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:06:05,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:06:05,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:06:05,034 INFO L87 Difference]: Start difference. First operand 15248 states and 24762 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:06,046 INFO L93 Difference]: Finished difference Result 42057 states and 68540 transitions. [2021-11-23 14:06:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:06:06,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 14:06:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:06,136 INFO L225 Difference]: With dead ends: 42057 [2021-11-23 14:06:06,136 INFO L226 Difference]: Without dead ends: 28345 [2021-11-23 14:06:06,164 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 [2021-11-23 14:06:06,165 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 197 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:06,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28345 states. [2021-11-23 14:06:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28345 to 28239. [2021-11-23 14:06:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28239 states, 28237 states have (on average 1.604667634663739) internal successors, (45311), 28238 states have internal predecessors, (45311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28239 states to 28239 states and 45311 transitions. [2021-11-23 14:06:07,673 INFO L78 Accepts]: Start accepts. Automaton has 28239 states and 45311 transitions. Word has length 68 [2021-11-23 14:06:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:07,674 INFO L470 AbstractCegarLoop]: Abstraction has 28239 states and 45311 transitions. [2021-11-23 14:06:07,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 28239 states and 45311 transitions. [2021-11-23 14:06:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 14:06:07,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:07,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:07,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 14:06:07,699 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:07,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1074162943, now seen corresponding path program 1 times [2021-11-23 14:06:07,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994128684] [2021-11-23 14:06:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:07,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:07,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:07,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994128684] [2021-11-23 14:06:07,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994128684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:07,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:07,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:06:07,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156598827] [2021-11-23 14:06:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:07,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:06:07,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:06:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:06:07,768 INFO L87 Difference]: Start difference. First operand 28239 states and 45311 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:09,418 INFO L93 Difference]: Finished difference Result 53495 states and 85707 transitions. [2021-11-23 14:06:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:06:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 14:06:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:09,588 INFO L225 Difference]: With dead ends: 53495 [2021-11-23 14:06:09,588 INFO L226 Difference]: Without dead ends: 53389 [2021-11-23 14:06:09,606 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 [2021-11-23 14:06:09,607 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 195 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:09,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53389 states. [2021-11-23 14:06:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53389 to 53283. [2021-11-23 14:06:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53283 states, 53281 states have (on average 1.5822338169328654) internal successors, (84303), 53282 states have internal predecessors, (84303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53283 states to 53283 states and 84303 transitions. [2021-11-23 14:06:11,620 INFO L78 Accepts]: Start accepts. Automaton has 53283 states and 84303 transitions. Word has length 69 [2021-11-23 14:06:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:11,621 INFO L470 AbstractCegarLoop]: Abstraction has 53283 states and 84303 transitions. [2021-11-23 14:06:11,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 53283 states and 84303 transitions. [2021-11-23 14:06:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 14:06:11,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:11,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:11,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 14:06:11,640 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 812049325, now seen corresponding path program 1 times [2021-11-23 14:06:11,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:11,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755466618] [2021-11-23 14:06:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:11,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:11,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:11,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755466618] [2021-11-23 14:06:11,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755466618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:11,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:11,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 14:06:11,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004742737] [2021-11-23 14:06:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:11,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 14:06:11,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 14:06:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 14:06:11,779 INFO L87 Difference]: Start difference. First operand 53283 states and 84303 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:14,514 INFO L93 Difference]: Finished difference Result 54012 states and 85317 transitions. [2021-11-23 14:06:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 14:06:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 14:06:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:14,673 INFO L225 Difference]: With dead ends: 54012 [2021-11-23 14:06:14,673 INFO L226 Difference]: Without dead ends: 53929 [2021-11-23 14:06:14,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 14:06:14,691 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 2295 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2295 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:14,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2295 Valid, 2184 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:06:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53929 states. [2021-11-23 14:06:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53929 to 53335. [2021-11-23 14:06:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53335 states, 53333 states have (on average 1.5820223876399226) internal successors, (84374), 53334 states have internal predecessors, (84374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53335 states to 53335 states and 84374 transitions. [2021-11-23 14:06:17,175 INFO L78 Accepts]: Start accepts. Automaton has 53335 states and 84374 transitions. Word has length 70 [2021-11-23 14:06:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:17,175 INFO L470 AbstractCegarLoop]: Abstraction has 53335 states and 84374 transitions. [2021-11-23 14:06:17,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 53335 states and 84374 transitions. [2021-11-23 14:06:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 14:06:17,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:17,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:17,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 14:06:17,194 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1048323149, now seen corresponding path program 1 times [2021-11-23 14:06:17,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:17,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390013603] [2021-11-23 14:06:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:17,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:17,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:17,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390013603] [2021-11-23 14:06:17,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390013603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:17,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:17,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 14:06:17,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426072858] [2021-11-23 14:06:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:17,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 14:06:17,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 14:06:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 14:06:17,311 INFO L87 Difference]: Start difference. First operand 53335 states and 84374 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:19,835 INFO L93 Difference]: Finished difference Result 54051 states and 85365 transitions. [2021-11-23 14:06:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 14:06:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 14:06:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:19,950 INFO L225 Difference]: With dead ends: 54051 [2021-11-23 14:06:19,950 INFO L226 Difference]: Without dead ends: 53941 [2021-11-23 14:06:19,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 14:06:19,968 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 1853 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:19,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 2622 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 14:06:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53941 states. [2021-11-23 14:06:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53941 to 53368. [2021-11-23 14:06:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53368 states, 53366 states have (on average 1.5819248210471086) internal successors, (84421), 53367 states have internal predecessors, (84421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53368 states to 53368 states and 84421 transitions. [2021-11-23 14:06:22,329 INFO L78 Accepts]: Start accepts. Automaton has 53368 states and 84421 transitions. Word has length 71 [2021-11-23 14:06:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:22,329 INFO L470 AbstractCegarLoop]: Abstraction has 53368 states and 84421 transitions. [2021-11-23 14:06:22,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 53368 states and 84421 transitions. [2021-11-23 14:06:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 14:06:22,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:22,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:22,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 14:06:22,344 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1776919271, now seen corresponding path program 1 times [2021-11-23 14:06:22,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:22,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798530777] [2021-11-23 14:06:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:22,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:22,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798530777] [2021-11-23 14:06:22,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798530777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:22,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:22,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 14:06:22,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58866403] [2021-11-23 14:06:22,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:22,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 14:06:22,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:06:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:06:22,411 INFO L87 Difference]: Start difference. First operand 53368 states and 84421 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:24,502 INFO L93 Difference]: Finished difference Result 53606 states and 84750 transitions. [2021-11-23 14:06:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 14:06:24,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 14:06:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:24,612 INFO L225 Difference]: With dead ends: 53606 [2021-11-23 14:06:24,613 INFO L226 Difference]: Without dead ends: 53431 [2021-11-23 14:06:24,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 14:06:24,630 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 602 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:24,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 765 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53431 states. [2021-11-23 14:06:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53431 to 53344. [2021-11-23 14:06:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53344 states, 53342 states have (on average 1.5819616812268007) internal successors, (84385), 53343 states have internal predecessors, (84385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53344 states to 53344 states and 84385 transitions. [2021-11-23 14:06:26,932 INFO L78 Accepts]: Start accepts. Automaton has 53344 states and 84385 transitions. Word has length 71 [2021-11-23 14:06:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:26,933 INFO L470 AbstractCegarLoop]: Abstraction has 53344 states and 84385 transitions. [2021-11-23 14:06:26,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 53344 states and 84385 transitions. [2021-11-23 14:06:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 14:06:26,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:26,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:26,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 14:06:26,949 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1278657569, now seen corresponding path program 1 times [2021-11-23 14:06:26,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:26,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094910979] [2021-11-23 14:06:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:26,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:27,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:27,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094910979] [2021-11-23 14:06:27,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094910979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:27,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:27,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:06:27,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459959742] [2021-11-23 14:06:27,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:27,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:06:27,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:06:27,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:06:27,011 INFO L87 Difference]: Start difference. First operand 53344 states and 84385 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:06:30,668 INFO L93 Difference]: Finished difference Result 104494 states and 165525 transitions. [2021-11-23 14:06:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 14:06:30,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 14:06:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:06:30,881 INFO L225 Difference]: With dead ends: 104494 [2021-11-23 14:06:30,881 INFO L226 Difference]: Without dead ends: 104370 [2021-11-23 14:06:30,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:06:30,905 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 425 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:06:30,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 954 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:06:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104370 states. [2021-11-23 14:06:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104370 to 104154. [2021-11-23 14:06:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104154 states, 104152 states have (on average 1.584674322144558) internal successors, (165047), 104153 states have internal predecessors, (165047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104154 states to 104154 states and 165047 transitions. [2021-11-23 14:06:35,654 INFO L78 Accepts]: Start accepts. Automaton has 104154 states and 165047 transitions. Word has length 72 [2021-11-23 14:06:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:06:35,654 INFO L470 AbstractCegarLoop]: Abstraction has 104154 states and 165047 transitions. [2021-11-23 14:06:35,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:06:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 104154 states and 165047 transitions. [2021-11-23 14:06:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 14:06:35,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:06:35,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:06:35,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 14:06:35,670 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:06:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:06:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash 524732878, now seen corresponding path program 1 times [2021-11-23 14:06:35,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:06:35,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482840264] [2021-11-23 14:06:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:06:35,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:06:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:06:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:06:35,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:06:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482840264] [2021-11-23 14:06:35,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482840264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:06:35,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:06:35,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 14:06:35,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481396674] [2021-11-23 14:06:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:06:35,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 14:06:35,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:06:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 14:06:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:06:35,753 INFO L87 Difference]: Start difference. First operand 104154 states and 165047 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)