./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product33.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_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/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_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/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_ea788212-7d2a-4c46-be88-8327d6a9c4c2/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 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:11:16,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:11:16,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:11:16,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:11:16,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:11:16,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:11:16,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:11:16,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:11:16,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:11:16,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:11:16,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:11:16,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:11:16,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:11:16,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:11:16,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:11:16,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:11:16,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:11:16,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:11:16,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:11:16,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:11:16,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:11:16,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:11:16,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:11:16,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:11:16,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:11:16,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:11:16,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:11:16,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:11:16,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:11:16,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:11:16,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:11:16,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:11:16,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:11:16,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:11:16,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:11:16,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:11:16,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:11:16,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:11:16,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:11:16,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:11:16,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:11:16,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:11:16,681 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:11:16,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:11:16,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:11:16,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:11:16,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:11:16,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:11:16,684 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:11:16,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:11:16,685 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:11:16,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:11:16,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:11:16,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:11:16,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:11:16,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:11:16,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:11:16,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:11:16,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:11:16,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:11:16,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:11:16,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:11:16,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:11:16,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:11:16,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:11:16,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:11:16,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:11:16,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:11:16,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:11:16,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:11:16,707 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:11:16,707 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:11:16,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:11:16,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:11:16,708 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_ea788212-7d2a-4c46-be88-8327d6a9c4c2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 [2021-11-23 14:11:16,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:11:16,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:11:16,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:11:16,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:11:16,996 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:11:16,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-23 14:11:17,063 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/data/d31a11dad/f992199fdcc842e48365772204a84f25/FLAGbe4b0654b [2021-11-23 14:11:17,717 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:11:17,717 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-23 14:11:17,756 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/data/d31a11dad/f992199fdcc842e48365772204a84f25/FLAGbe4b0654b [2021-11-23 14:11:17,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/data/d31a11dad/f992199fdcc842e48365772204a84f25 [2021-11-23 14:11:17,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:11:17,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:11:17,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:11:17,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:11:17,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:11:17,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:17" (1/1) ... [2021-11-23 14:11:17,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42979a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:17, skipping insertion in model container [2021-11-23 14:11:17,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:17" (1/1) ... [2021-11-23 14:11:17,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:11:18,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:11:18,351 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_ea788212-7d2a-4c46-be88-8327d6a9c4c2/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-23 14:11:18,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:11:18,708 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:11:18,752 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_ea788212-7d2a-4c46-be88-8327d6a9c4c2/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-23 14:11:18,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:11:18,893 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:11:18,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18 WrapperNode [2021-11-23 14:11:18,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:11:18,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:11:18,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:11:18,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:11:18,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:18,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,075 INFO L137 Inliner]: procedures = 134, calls = 228, calls flagged for inlining = 137, calls inlined = 201, statements flattened = 3064 [2021-11-23 14:11:19,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:11:19,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:11:19,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:11:19,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:11:19,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:11:19,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:11:19,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:11:19,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:11:19,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (1/1) ... [2021-11-23 14:11:19,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:11:19,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:11:19,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:11:19,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:11:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 14:11:19,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:11:19,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:11:19,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:11:19,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:11:19,591 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:11:19,593 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:11:21,450 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:11:21,474 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:11:21,476 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:11:21,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:21 BoogieIcfgContainer [2021-11-23 14:11:21,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:11:21,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:11:21,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:11:21,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:11:21,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:17" (1/3) ... [2021-11-23 14:11:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ff148a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:21, skipping insertion in model container [2021-11-23 14:11:21,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:18" (2/3) ... [2021-11-23 14:11:21,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ff148a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:21, skipping insertion in model container [2021-11-23 14:11:21,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:21" (3/3) ... [2021-11-23 14:11:21,490 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product33.cil.c [2021-11-23 14:11:21,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:11:21,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 14:11:21,552 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:11:21,560 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 14:11:21,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 14:11:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 649 states, 646 states have (on average 1.673374613003096) internal successors, (1081), 648 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states 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 14:11:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 14:11:21,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:21,614 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] [2021-11-23 14:11:21,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:21,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2041861686, now seen corresponding path program 1 times [2021-11-23 14:11:21,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:21,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822502765] [2021-11-23 14:11:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:21,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:22,031 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 14:11:22,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:22,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822502765] [2021-11-23 14:11:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822502765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:22,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:22,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:22,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320963489] [2021-11-23 14:11:22,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:22,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:22,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:22,124 INFO L87 Difference]: Start difference. First operand has 649 states, 646 states have (on average 1.673374613003096) internal successors, (1081), 648 states have internal predecessors, (1081), 0 states have call successors, (0), 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 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:11:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:22,598 INFO L93 Difference]: Finished difference Result 1902 states and 3175 transitions. [2021-11-23 14:11:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 14:11:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:22,644 INFO L225 Difference]: With dead ends: 1902 [2021-11-23 14:11:22,644 INFO L226 Difference]: Without dead ends: 997 [2021-11-23 14:11:22,658 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 14:11:22,667 INFO L933 BasicCegarLoop]: 2109 mSDtfsCounter, 1050 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:22,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 3154 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-23 14:11:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 509. [2021-11-23 14:11:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6844181459566074) internal successors, (854), 508 states have internal predecessors, (854), 0 states have call successors, (0), 0 states 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 14:11:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 854 transitions. [2021-11-23 14:11:22,812 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 854 transitions. Word has length 54 [2021-11-23 14:11:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:22,813 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 854 transitions. [2021-11-23 14:11:22,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:11:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 854 transitions. [2021-11-23 14:11:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 14:11:22,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:22,822 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] [2021-11-23 14:11:22,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:11:22,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1829251417, now seen corresponding path program 1 times [2021-11-23 14:11:22,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:22,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764228735] [2021-11-23 14:11:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:22,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:22,955 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 14:11:22,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:22,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764228735] [2021-11-23 14:11:22,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764228735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:22,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:22,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:22,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629286410] [2021-11-23 14:11:22,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:22,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:22,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:22,960 INFO L87 Difference]: Start difference. First operand 509 states and 854 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 14:11:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:23,204 INFO L93 Difference]: Finished difference Result 1468 states and 2470 transitions. [2021-11-23 14:11:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 14:11:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 14:11:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:23,214 INFO L225 Difference]: With dead ends: 1468 [2021-11-23 14:11:23,214 INFO L226 Difference]: Without dead ends: 982 [2021-11-23 14:11:23,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 14:11:23,223 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 1662 mSDsluCounter, 2416 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 4032 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:23,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 4032 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-23 14:11:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 509. [2021-11-23 14:11:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6824457593688362) internal successors, (853), 508 states have internal predecessors, (853), 0 states have call successors, (0), 0 states 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 14:11:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 853 transitions. [2021-11-23 14:11:23,296 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 853 transitions. Word has length 56 [2021-11-23 14:11:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:23,297 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 853 transitions. [2021-11-23 14:11:23,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 14:11:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 853 transitions. [2021-11-23 14:11:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 14:11:23,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:23,302 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] [2021-11-23 14:11:23,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:11:23,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash -525255188, now seen corresponding path program 1 times [2021-11-23 14:11:23,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:23,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518491334] [2021-11-23 14:11:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:23,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:23,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:23,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518491334] [2021-11-23 14:11:23,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518491334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:23,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:23,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:23,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323177071] [2021-11-23 14:11:23,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:23,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:23,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:23,385 INFO L87 Difference]: Start difference. First operand 509 states and 853 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:23,436 INFO L93 Difference]: Finished difference Result 997 states and 1677 transitions. [2021-11-23 14:11:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 14:11:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:23,442 INFO L225 Difference]: With dead ends: 997 [2021-11-23 14:11:23,442 INFO L226 Difference]: Without dead ends: 516 [2021-11-23 14:11:23,443 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 14:11:23,445 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 826 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 879 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 14:11:23,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 879 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-23 14:11:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 509. [2021-11-23 14:11:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6765285996055226) internal successors, (850), 508 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 14:11:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 850 transitions. [2021-11-23 14:11:23,488 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 850 transitions. Word has length 57 [2021-11-23 14:11:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:23,489 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 850 transitions. [2021-11-23 14:11:23,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 850 transitions. [2021-11-23 14:11:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 14:11:23,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:23,491 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 14:11:23,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:11:23,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1953577583, now seen corresponding path program 1 times [2021-11-23 14:11:23,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160048453] [2021-11-23 14:11:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:23,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:23,582 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 14:11:23,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:23,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160048453] [2021-11-23 14:11:23,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160048453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:23,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:23,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:23,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819143279] [2021-11-23 14:11:23,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:23,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:23,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:23,588 INFO L87 Difference]: Start difference. First operand 509 states and 850 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 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 14:11:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:23,799 INFO L93 Difference]: Finished difference Result 1455 states and 2447 transitions. [2021-11-23 14:11:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:11:23,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 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 14:11:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:23,809 INFO L225 Difference]: With dead ends: 1455 [2021-11-23 14:11:23,809 INFO L226 Difference]: Without dead ends: 979 [2021-11-23 14:11:23,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:23,823 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 4001 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4001 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:23,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4001 Valid, 1681 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-23 14:11:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 509. [2021-11-23 14:11:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6745562130177514) internal successors, (849), 508 states have internal predecessors, (849), 0 states have call successors, (0), 0 states 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 14:11:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 849 transitions. [2021-11-23 14:11:23,870 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 849 transitions. Word has length 59 [2021-11-23 14:11:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:23,873 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 849 transitions. [2021-11-23 14:11:23,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 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 14:11:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 849 transitions. [2021-11-23 14:11:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 14:11:23,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:23,877 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 14:11:23,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 14:11:23,877 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:23,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1108044802, now seen corresponding path program 1 times [2021-11-23 14:11:23,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167455818] [2021-11-23 14:11:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:23,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:24,008 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 14:11:24,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:24,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167455818] [2021-11-23 14:11:24,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167455818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:24,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:24,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:24,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820118757] [2021-11-23 14:11:24,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:24,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:24,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:24,015 INFO L87 Difference]: Start difference. First operand 509 states and 849 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 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 14:11:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:24,230 INFO L93 Difference]: Finished difference Result 1462 states and 2453 transitions. [2021-11-23 14:11:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:11:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 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 14:11:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:24,238 INFO L225 Difference]: With dead ends: 1462 [2021-11-23 14:11:24,239 INFO L226 Difference]: Without dead ends: 986 [2021-11-23 14:11:24,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:24,241 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 4005 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4005 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:24,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4005 Valid, 1684 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-11-23 14:11:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 509. [2021-11-23 14:11:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6725838264299804) internal successors, (848), 508 states have internal predecessors, (848), 0 states have call successors, (0), 0 states 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 14:11:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 848 transitions. [2021-11-23 14:11:24,292 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 848 transitions. Word has length 60 [2021-11-23 14:11:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:24,292 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 848 transitions. [2021-11-23 14:11:24,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 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 14:11:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 848 transitions. [2021-11-23 14:11:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 14:11:24,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:24,299 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 14:11:24,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:11:24,299 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1933416372, now seen corresponding path program 1 times [2021-11-23 14:11:24,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994930225] [2021-11-23 14:11:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:24,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:24,388 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 14:11:24,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:24,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994930225] [2021-11-23 14:11:24,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994930225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:24,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:24,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:24,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035782388] [2021-11-23 14:11:24,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:24,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:24,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:24,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:24,391 INFO L87 Difference]: Start difference. First operand 509 states and 848 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 14:11:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:24,434 INFO L93 Difference]: Finished difference Result 758 states and 1247 transitions. [2021-11-23 14:11:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:24,435 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 14:11:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:24,439 INFO L225 Difference]: With dead ends: 758 [2021-11-23 14:11:24,439 INFO L226 Difference]: Without dead ends: 512 [2021-11-23 14:11:24,440 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 14:11:24,441 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 1 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1690 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 14:11:24,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1690 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-23 14:11:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 511. [2021-11-23 14:11:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 509 states have (on average 1.6699410609037328) internal successors, (850), 510 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 14:11:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 850 transitions. [2021-11-23 14:11:24,481 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 850 transitions. Word has length 61 [2021-11-23 14:11:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:24,481 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 850 transitions. [2021-11-23 14:11:24,482 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 14:11:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 850 transitions. [2021-11-23 14:11:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 14:11:24,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:24,484 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:24,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 14:11:24,484 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1970782319, now seen corresponding path program 1 times [2021-11-23 14:11:24,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432507799] [2021-11-23 14:11:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:24,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:24,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432507799] [2021-11-23 14:11:24,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432507799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:24,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:24,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:24,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177555134] [2021-11-23 14:11:24,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:24,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:24,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:24,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:24,558 INFO L87 Difference]: Start difference. First operand 511 states and 850 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 14:11:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:24,665 INFO L93 Difference]: Finished difference Result 1405 states and 2360 transitions. [2021-11-23 14:11:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:24,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 14:11:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:24,674 INFO L225 Difference]: With dead ends: 1405 [2021-11-23 14:11:24,674 INFO L226 Difference]: Without dead ends: 932 [2021-11-23 14:11:24,676 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 14:11:24,677 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 798 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1596 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 14:11:24,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1596 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-11-23 14:11:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 686. [2021-11-23 14:11:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 684 states have (on average 1.6973684210526316) internal successors, (1161), 685 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states 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 14:11:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1161 transitions. [2021-11-23 14:11:24,744 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1161 transitions. Word has length 70 [2021-11-23 14:11:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:24,745 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 1161 transitions. [2021-11-23 14:11:24,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 14:11:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1161 transitions. [2021-11-23 14:11:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 14:11:24,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:24,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:24,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 14:11:24,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1205770079, now seen corresponding path program 1 times [2021-11-23 14:11:24,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617708983] [2021-11-23 14:11:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:24,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:24,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:24,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617708983] [2021-11-23 14:11:24,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617708983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:24,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:24,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:11:24,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465981918] [2021-11-23 14:11:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:24,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:11:24,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:11:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:11:24,824 INFO L87 Difference]: Start difference. First operand 686 states and 1161 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 14:11:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:25,065 INFO L93 Difference]: Finished difference Result 1972 states and 3373 transitions. [2021-11-23 14:11:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:11:25,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 14:11:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:25,076 INFO L225 Difference]: With dead ends: 1972 [2021-11-23 14:11:25,076 INFO L226 Difference]: Without dead ends: 1324 [2021-11-23 14:11:25,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:25,078 INFO L933 BasicCegarLoop]: 1619 mSDtfsCounter, 1631 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 4047 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:25,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 4047 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-11-23 14:11:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 686. [2021-11-23 14:11:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 684 states have (on average 1.6944444444444444) internal successors, (1159), 685 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states 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 14:11:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1159 transitions. [2021-11-23 14:11:25,155 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1159 transitions. Word has length 71 [2021-11-23 14:11:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:25,157 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 1159 transitions. [2021-11-23 14:11:25,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 14:11:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1159 transitions. [2021-11-23 14:11:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 14:11:25,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:25,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 14:11:25,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash 28693350, now seen corresponding path program 1 times [2021-11-23 14:11:25,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:25,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655440529] [2021-11-23 14:11:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:25,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:25,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:25,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655440529] [2021-11-23 14:11:25,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655440529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:25,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:25,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:25,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727183607] [2021-11-23 14:11:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:25,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:25,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:25,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:25,253 INFO L87 Difference]: Start difference. First operand 686 states and 1159 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:25,379 INFO L93 Difference]: Finished difference Result 1970 states and 3365 transitions. [2021-11-23 14:11:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 14:11:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:25,390 INFO L225 Difference]: With dead ends: 1970 [2021-11-23 14:11:25,390 INFO L226 Difference]: Without dead ends: 1322 [2021-11-23 14:11:25,394 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 14:11:25,396 INFO L933 BasicCegarLoop]: 1242 mSDtfsCounter, 795 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 2077 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 14:11:25,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 2077 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-11-23 14:11:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1076. [2021-11-23 14:11:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1074 states have (on average 1.728119180633147) internal successors, (1856), 1075 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states 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 14:11:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1856 transitions. [2021-11-23 14:11:25,504 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1856 transitions. Word has length 72 [2021-11-23 14:11:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:25,504 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1856 transitions. [2021-11-23 14:11:25,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1856 transitions. [2021-11-23 14:11:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 14:11:25,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:25,507 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:25,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 14:11:25,508 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1224894661, now seen corresponding path program 1 times [2021-11-23 14:11:25,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:25,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658242099] [2021-11-23 14:11:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:25,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:25,569 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 14:11:25,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658242099] [2021-11-23 14:11:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658242099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:11:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737607820] [2021-11-23 14:11:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:25,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:11:25,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:11:25,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:11:25,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:11:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 14:11:25,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:11:26,027 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 14:11:26,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:11:26,170 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 14:11:26,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737607820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:11:26,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:11:26,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 14:11:26,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007507037] [2021-11-23 14:11:26,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:11:26,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 14:11:26,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 14:11:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:11:26,173 INFO L87 Difference]: Start difference. First operand 1076 states and 1856 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:26,524 INFO L93 Difference]: Finished difference Result 3708 states and 6376 transitions. [2021-11-23 14:11:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:11:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 14:11:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:26,550 INFO L225 Difference]: With dead ends: 3708 [2021-11-23 14:11:26,550 INFO L226 Difference]: Without dead ends: 3462 [2021-11-23 14:11:26,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 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 14:11:26,553 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 3968 mSDsluCounter, 4081 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 4926 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:26,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3968 Valid, 4926 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-11-23 14:11:26,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2724. [2021-11-23 14:11:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2722 states have (on average 1.7578986039676707) internal successors, (4785), 2723 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states 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 14:11:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4785 transitions. [2021-11-23 14:11:26,847 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4785 transitions. Word has length 72 [2021-11-23 14:11:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:26,848 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 4785 transitions. [2021-11-23 14:11:26,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4785 transitions. [2021-11-23 14:11:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 14:11:26,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:26,854 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, 1, 1] [2021-11-23 14:11:26,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:11:27,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea788212-7d2a-4c46-be88-8327d6a9c4c2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:11:27,069 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash -490173197, now seen corresponding path program 1 times [2021-11-23 14:11:27,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:27,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937561569] [2021-11-23 14:11:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:27,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:27,122 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 14:11:27,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937561569] [2021-11-23 14:11:27,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937561569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:27,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:27,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:27,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501279169] [2021-11-23 14:11:27,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:27,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:27,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:27,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:27,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:27,125 INFO L87 Difference]: Start difference. First operand 2724 states and 4785 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:27,415 INFO L93 Difference]: Finished difference Result 7096 states and 12493 transitions. [2021-11-23 14:11:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 14:11:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:27,444 INFO L225 Difference]: With dead ends: 7096 [2021-11-23 14:11:27,444 INFO L226 Difference]: Without dead ends: 4572 [2021-11-23 14:11:27,448 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 14:11:27,449 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 793 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1681 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 14:11:27,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1681 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4572 states. [2021-11-23 14:11:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4572 to 4326. [2021-11-23 14:11:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4324 states have (on average 1.7641073080481036) internal successors, (7628), 4325 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states 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 14:11:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 7628 transitions. [2021-11-23 14:11:27,762 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 7628 transitions. Word has length 75 [2021-11-23 14:11:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:27,763 INFO L470 AbstractCegarLoop]: Abstraction has 4326 states and 7628 transitions. [2021-11-23 14:11:27,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 7628 transitions. [2021-11-23 14:11:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 14:11:27,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:27,770 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, 1, 1, 1] [2021-11-23 14:11:27,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 14:11:27,770 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1934288859, now seen corresponding path program 1 times [2021-11-23 14:11:27,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:27,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033176792] [2021-11-23 14:11:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:27,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:27,826 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 14:11:27,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:27,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033176792] [2021-11-23 14:11:27,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033176792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:27,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:27,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:27,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766383760] [2021-11-23 14:11:27,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:27,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:27,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:27,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:27,829 INFO L87 Difference]: Start difference. First operand 4326 states and 7628 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:28,223 INFO L93 Difference]: Finished difference Result 10560 states and 18620 transitions. [2021-11-23 14:11:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:28,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-23 14:11:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:28,291 INFO L225 Difference]: With dead ends: 10560 [2021-11-23 14:11:28,292 INFO L226 Difference]: Without dead ends: 6801 [2021-11-23 14:11:28,299 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 14:11:28,300 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 791 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1632 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 14:11:28,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 1632 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-11-23 14:11:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 6555. [2021-11-23 14:11:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6555 states, 6553 states have (on average 1.7633145124370517) internal successors, (11555), 6554 states have internal predecessors, (11555), 0 states have call successors, (0), 0 states 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 14:11:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6555 states to 6555 states and 11555 transitions. [2021-11-23 14:11:28,958 INFO L78 Accepts]: Start accepts. Automaton has 6555 states and 11555 transitions. Word has length 76 [2021-11-23 14:11:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:28,959 INFO L470 AbstractCegarLoop]: Abstraction has 6555 states and 11555 transitions. [2021-11-23 14:11:28,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6555 states and 11555 transitions. [2021-11-23 14:11:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 14:11:28,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:28,967 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, 1, 1, 1, 1] [2021-11-23 14:11:28,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 14:11:28,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash -230935551, now seen corresponding path program 1 times [2021-11-23 14:11:28,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:28,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312687508] [2021-11-23 14:11:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:28,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:29,021 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 14:11:29,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312687508] [2021-11-23 14:11:29,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312687508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:29,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:29,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:29,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311329347] [2021-11-23 14:11:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:29,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:29,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:29,024 INFO L87 Difference]: Start difference. First operand 6555 states and 11555 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:29,732 INFO L93 Difference]: Finished difference Result 15648 states and 27573 transitions. [2021-11-23 14:11:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:29,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 14:11:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:29,766 INFO L225 Difference]: With dead ends: 15648 [2021-11-23 14:11:29,766 INFO L226 Difference]: Without dead ends: 10249 [2021-11-23 14:11:29,778 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 14:11:29,779 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 789 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1632 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 14:11:29,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 1632 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2021-11-23 14:11:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 10003. [2021-11-23 14:11:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10001 states have (on average 1.7605239476052394) internal successors, (17607), 10002 states have internal predecessors, (17607), 0 states have call successors, (0), 0 states 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 14:11:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 17607 transitions. [2021-11-23 14:11:30,607 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 17607 transitions. Word has length 77 [2021-11-23 14:11:30,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:30,607 INFO L470 AbstractCegarLoop]: Abstraction has 10003 states and 17607 transitions. [2021-11-23 14:11:30,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 17607 transitions. [2021-11-23 14:11:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 14:11:30,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:30,619 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, 1, 1, 1, 1, 1] [2021-11-23 14:11:30,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 14:11:30,620 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash 163453589, now seen corresponding path program 1 times [2021-11-23 14:11:30,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:30,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282590002] [2021-11-23 14:11:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:30,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:30,679 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 14:11:30,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282590002] [2021-11-23 14:11:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282590002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:30,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746705507] [2021-11-23 14:11:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:30,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:30,683 INFO L87 Difference]: Start difference. First operand 10003 states and 17607 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:31,730 INFO L93 Difference]: Finished difference Result 25023 states and 44129 transitions. [2021-11-23 14:11:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 14:11:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:31,789 INFO L225 Difference]: With dead ends: 25023 [2021-11-23 14:11:31,789 INFO L226 Difference]: Without dead ends: 16724 [2021-11-23 14:11:31,807 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 14:11:31,808 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 787 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1680 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 14:11:31,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 1680 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16724 states. [2021-11-23 14:11:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16724 to 16478. [2021-11-23 14:11:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16478 states, 16476 states have (on average 1.7615319252245691) internal successors, (29023), 16477 states have internal predecessors, (29023), 0 states have call successors, (0), 0 states 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 14:11:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16478 states to 16478 states and 29023 transitions. [2021-11-23 14:11:32,914 INFO L78 Accepts]: Start accepts. Automaton has 16478 states and 29023 transitions. Word has length 78 [2021-11-23 14:11:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:32,914 INFO L470 AbstractCegarLoop]: Abstraction has 16478 states and 29023 transitions. [2021-11-23 14:11:32,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 16478 states and 29023 transitions. [2021-11-23 14:11:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 14:11:32,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:32,926 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, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:32,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 14:11:32,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash -384900719, now seen corresponding path program 1 times [2021-11-23 14:11:32,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167093179] [2021-11-23 14:11:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:32,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:32,975 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 14:11:32,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167093179] [2021-11-23 14:11:32,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167093179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:32,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:32,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:32,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141319788] [2021-11-23 14:11:32,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:32,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:32,978 INFO L87 Difference]: Start difference. First operand 16478 states and 29023 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:34,632 INFO L93 Difference]: Finished difference Result 42070 states and 74341 transitions. [2021-11-23 14:11:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 14:11:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:34,742 INFO L225 Difference]: With dead ends: 42070 [2021-11-23 14:11:34,743 INFO L226 Difference]: Without dead ends: 28186 [2021-11-23 14:11:34,774 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 14:11:34,775 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 785 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1679 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 14:11:34,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1679 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28186 states. [2021-11-23 14:11:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28186 to 27940. [2021-11-23 14:11:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27940 states, 27938 states have (on average 1.764263726823681) internal successors, (49290), 27939 states have internal predecessors, (49290), 0 states have call successors, (0), 0 states 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 14:11:36,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27940 states to 27940 states and 49290 transitions. [2021-11-23 14:11:36,338 INFO L78 Accepts]: Start accepts. Automaton has 27940 states and 49290 transitions. Word has length 79 [2021-11-23 14:11:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:36,339 INFO L470 AbstractCegarLoop]: Abstraction has 27940 states and 49290 transitions. [2021-11-23 14:11:36,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27940 states and 49290 transitions. [2021-11-23 14:11:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 14:11:36,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:36,353 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:36,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 14:11:36,354 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1709382663, now seen corresponding path program 1 times [2021-11-23 14:11:36,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:36,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373724238] [2021-11-23 14:11:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:36,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:36,400 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 14:11:36,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373724238] [2021-11-23 14:11:36,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373724238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:36,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:36,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:36,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788279906] [2021-11-23 14:11:36,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:36,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:36,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:36,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:36,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:36,403 INFO L87 Difference]: Start difference. First operand 27940 states and 49290 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:38,475 INFO L93 Difference]: Finished difference Result 74425 states and 131511 transitions. [2021-11-23 14:11:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:38,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 14:11:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:38,609 INFO L225 Difference]: With dead ends: 74425 [2021-11-23 14:11:38,609 INFO L226 Difference]: Without dead ends: 50041 [2021-11-23 14:11:38,643 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 14:11:38,643 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 783 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1688 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 14:11:38,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1688 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50041 states. [2021-11-23 14:11:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50041 to 49795. [2021-11-23 14:11:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49795 states, 49793 states have (on average 1.7627779005081035) internal successors, (87774), 49794 states have internal predecessors, (87774), 0 states have call successors, (0), 0 states 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 14:11:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49795 states to 49795 states and 87774 transitions. [2021-11-23 14:11:41,051 INFO L78 Accepts]: Start accepts. Automaton has 49795 states and 87774 transitions. Word has length 80 [2021-11-23 14:11:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:41,051 INFO L470 AbstractCegarLoop]: Abstraction has 49795 states and 87774 transitions. [2021-11-23 14:11:41,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 49795 states and 87774 transitions. [2021-11-23 14:11:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 14:11:41,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:41,077 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:41,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 14:11:41,077 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2052812707, now seen corresponding path program 1 times [2021-11-23 14:11:41,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:41,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572059571] [2021-11-23 14:11:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:41,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:41,133 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 14:11:41,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:41,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572059571] [2021-11-23 14:11:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572059571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:41,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:41,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:41,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752720556] [2021-11-23 14:11:41,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:41,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:41,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:41,136 INFO L87 Difference]: Start difference. First operand 49795 states and 87774 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:44,907 INFO L93 Difference]: Finished difference Result 127568 states and 224765 transitions. [2021-11-23 14:11:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-23 14:11:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:45,128 INFO L225 Difference]: With dead ends: 127568 [2021-11-23 14:11:45,129 INFO L226 Difference]: Without dead ends: 83667 [2021-11-23 14:11:45,178 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 14:11:45,180 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 781 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1632 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 14:11:45,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1632 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83667 states. [2021-11-23 14:11:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83667 to 83421. [2021-11-23 14:11:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83421 states, 83419 states have (on average 1.7562785456550667) internal successors, (146507), 83420 states have internal predecessors, (146507), 0 states have call successors, (0), 0 states 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 14:11:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83421 states to 83421 states and 146507 transitions. [2021-11-23 14:11:49,364 INFO L78 Accepts]: Start accepts. Automaton has 83421 states and 146507 transitions. Word has length 81 [2021-11-23 14:11:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:49,364 INFO L470 AbstractCegarLoop]: Abstraction has 83421 states and 146507 transitions. [2021-11-23 14:11:49,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 83421 states and 146507 transitions. [2021-11-23 14:11:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 14:11:49,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:49,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:49,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 14:11:49,381 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash -949555931, now seen corresponding path program 1 times [2021-11-23 14:11:49,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:49,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138701106] [2021-11-23 14:11:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:49,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:49,424 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 14:11:49,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:49,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138701106] [2021-11-23 14:11:49,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138701106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:49,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:49,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:11:49,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036941295] [2021-11-23 14:11:49,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:49,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:11:49,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:11:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:11:49,426 INFO L87 Difference]: Start difference. First operand 83421 states and 146507 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:56,044 INFO L93 Difference]: Finished difference Result 229960 states and 405032 transitions. [2021-11-23 14:11:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:11:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-23 14:11:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:56,378 INFO L225 Difference]: With dead ends: 229960 [2021-11-23 14:11:56,378 INFO L226 Difference]: Without dead ends: 154101 [2021-11-23 14:11:56,472 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 14:11:56,473 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 779 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1679 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 14:11:56,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 1679 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154101 states. [2021-11-23 14:12:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154101 to 153855. [2021-11-23 14:12:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153855 states, 153853 states have (on average 1.7584902471840003) internal successors, (270549), 153854 states have internal predecessors, (270549), 0 states have call successors, (0), 0 states 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 14:12:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153855 states to 153855 states and 270549 transitions. [2021-11-23 14:12:04,620 INFO L78 Accepts]: Start accepts. Automaton has 153855 states and 270549 transitions. Word has length 82 [2021-11-23 14:12:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:04,620 INFO L470 AbstractCegarLoop]: Abstraction has 153855 states and 270549 transitions. [2021-11-23 14:12:04,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 153855 states and 270549 transitions. [2021-11-23 14:12:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 14:12:04,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:04,638 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:04,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 14:12:04,639 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:04,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:04,639 INFO L85 PathProgramCache]: Analyzing trace with hash 994970733, now seen corresponding path program 1 times [2021-11-23 14:12:04,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:04,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420746408] [2021-11-23 14:12:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:04,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:04,681 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 14:12:04,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:04,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420746408] [2021-11-23 14:12:04,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420746408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:12:04,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:12:04,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:12:04,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398217530] [2021-11-23 14:12:04,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:12:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:12:04,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:12:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:12:04,683 INFO L87 Difference]: Start difference. First operand 153855 states and 270549 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)