./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product12.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_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/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_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/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_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/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 cd09b7e02dd7459ada96201e9b5a915c0f0209c05135bf5a5174f874492a34ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:36:24,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:36:24,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:36:24,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:36:24,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:36:24,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:36:24,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:36:24,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:36:24,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:36:24,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:36:24,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:36:24,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:36:24,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:36:24,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:36:24,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:36:24,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:36:24,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:36:24,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:36:24,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:36:24,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:36:24,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:36:24,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:36:24,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:36:24,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:36:24,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:36:24,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:36:24,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:36:24,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:36:24,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:36:24,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:36:24,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:36:24,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:36:24,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:36:24,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:36:24,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:36:24,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:36:24,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:36:24,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:36:24,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:36:24,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:36:24,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:36:24,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:36:24,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:36:24,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:36:24,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:36:24,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:36:24,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:36:24,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:36:24,847 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:36:24,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:36:24,847 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:36:24,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:36:24,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:36:24,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:36:24,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:36:24,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:36:24,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:36:24,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:36:24,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:36:24,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:36:24,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:36:24,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:36:24,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:36:24,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:36:24,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:36:24,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:36:24,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:36:24,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:36:24,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:36:24,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:36:24,853 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:36:24,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:36:24,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:36:24,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:36:24,854 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_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd09b7e02dd7459ada96201e9b5a915c0f0209c05135bf5a5174f874492a34ab [2021-11-23 12:36:25,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:36:25,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:36:25,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:36:25,171 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:36:25,172 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:36:25,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/product-lines/email_spec8_product12.cil.c [2021-11-23 12:36:25,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/data/fca9df13b/ca8e581ef3ae4d2f9d28934b20c7dc4d/FLAGe93167c87 [2021-11-23 12:36:25,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:36:25,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c [2021-11-23 12:36:25,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/data/fca9df13b/ca8e581ef3ae4d2f9d28934b20c7dc4d/FLAGe93167c87 [2021-11-23 12:36:26,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/data/fca9df13b/ca8e581ef3ae4d2f9d28934b20c7dc4d [2021-11-23 12:36:26,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:36:26,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:36:26,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:36:26,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:36:26,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:36:26,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:26,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6111132c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26, skipping insertion in model container [2021-11-23 12:36:26,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:26,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:36:26,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:36:26,621 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_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c[16969,16982] [2021-11-23 12:36:26,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:36:26,795 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:36:26,862 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_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c[16969,16982] [2021-11-23 12:36:26,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:36:26,958 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:36:26,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26 WrapperNode [2021-11-23 12:36:26,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:36:26,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:36:26,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:36:26,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:36:26,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:26,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,085 INFO L137 Inliner]: procedures = 123, calls = 191, calls flagged for inlining = 103, calls inlined = 115, statements flattened = 1801 [2021-11-23 12:36:27,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:36:27,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:36:27,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:36:27,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:36:27,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:36:27,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:36:27,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:36:27,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:36:27,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (1/1) ... [2021-11-23 12:36:27,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:36:27,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:36:27,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:36:27,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:36:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 12:36:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:36:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:36:27,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:36:27,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:36:27,588 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:36:27,590 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:36:28,671 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:36:28,692 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:36:28,694 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:36:28,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:36:28 BoogieIcfgContainer [2021-11-23 12:36:28,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:36:28,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:36:28,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:36:28,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:36:28,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:36:26" (1/3) ... [2021-11-23 12:36:28,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209ec3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:36:28, skipping insertion in model container [2021-11-23 12:36:28,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:36:26" (2/3) ... [2021-11-23 12:36:28,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209ec3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:36:28, skipping insertion in model container [2021-11-23 12:36:28,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:36:28" (3/3) ... [2021-11-23 12:36:28,708 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product12.cil.c [2021-11-23 12:36:28,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:36:28,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 12:36:28,769 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:36:28,783 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 12:36:28,783 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 12:36:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 419 states, 416 states have (on average 1.7043269230769231) internal successors, (709), 418 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 12:36:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 12:36:28,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:28,828 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] [2021-11-23 12:36:28,829 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 248400986, now seen corresponding path program 1 times [2021-11-23 12:36:28,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:28,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738888570] [2021-11-23 12:36:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:28,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:29,142 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 12:36:29,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:29,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738888570] [2021-11-23 12:36:29,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738888570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:29,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:29,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:29,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631812079] [2021-11-23 12:36:29,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:29,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:29,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:29,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:29,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:29,186 INFO L87 Difference]: Start difference. First operand has 419 states, 416 states have (on average 1.7043269230769231) internal successors, (709), 418 states have internal predecessors, (709), 0 states have call successors, (0), 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 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 12:36:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:29,340 INFO L93 Difference]: Finished difference Result 1212 states and 2059 transitions. [2021-11-23 12:36:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-23 12:36:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:29,377 INFO L225 Difference]: With dead ends: 1212 [2021-11-23 12:36:29,377 INFO L226 Difference]: Without dead ends: 725 [2021-11-23 12:36:29,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:29,392 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 678 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:36:29,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 2038 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-23 12:36:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 373. [2021-11-23 12:36:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 371 states have (on average 1.7061994609164421) internal successors, (633), 372 states have internal predecessors, (633), 0 states have call successors, (0), 0 states 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 12:36:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 633 transitions. [2021-11-23 12:36:29,495 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 633 transitions. Word has length 48 [2021-11-23 12:36:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:29,496 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 633 transitions. [2021-11-23 12:36:29,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 12:36:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 633 transitions. [2021-11-23 12:36:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 12:36:29,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:29,541 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] [2021-11-23 12:36:29,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:36:29,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:29,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1456678835, now seen corresponding path program 1 times [2021-11-23 12:36:29,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:29,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546161601] [2021-11-23 12:36:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:29,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:29,715 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 12:36:29,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546161601] [2021-11-23 12:36:29,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546161601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:29,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:29,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:36:29,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980219745] [2021-11-23 12:36:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:29,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:36:29,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:36:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:36:29,721 INFO L87 Difference]: Start difference. First operand 373 states and 633 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 12:36:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:29,923 INFO L93 Difference]: Finished difference Result 1060 states and 1807 transitions. [2021-11-23 12:36:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:36:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-23 12:36:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:29,930 INFO L225 Difference]: With dead ends: 1060 [2021-11-23 12:36:29,930 INFO L226 Difference]: Without dead ends: 710 [2021-11-23 12:36:29,935 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 12:36:29,937 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 1220 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 2927 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 12:36:29,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 2927 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:36:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-11-23 12:36:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 373. [2021-11-23 12:36:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 371 states have (on average 1.7035040431266846) internal successors, (632), 372 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 12:36:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 632 transitions. [2021-11-23 12:36:29,977 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 632 transitions. Word has length 50 [2021-11-23 12:36:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:29,979 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 632 transitions. [2021-11-23 12:36:29,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 12:36:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 632 transitions. [2021-11-23 12:36:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:36:29,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:29,987 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] [2021-11-23 12:36:29,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:36:29,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1469536584, now seen corresponding path program 1 times [2021-11-23 12:36:29,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:29,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822395592] [2021-11-23 12:36:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:29,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:30,099 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 12:36:30,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:30,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822395592] [2021-11-23 12:36:30,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822395592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:30,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:30,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:30,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659718445] [2021-11-23 12:36:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:30,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:30,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:30,106 INFO L87 Difference]: Start difference. First operand 373 states and 632 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 12:36:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:30,146 INFO L93 Difference]: Finished difference Result 725 states and 1235 transitions. [2021-11-23 12:36:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:30,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-23 12:36:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:30,150 INFO L225 Difference]: With dead ends: 725 [2021-11-23 12:36:30,150 INFO L226 Difference]: Without dead ends: 380 [2021-11-23 12:36:30,151 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 12:36:30,158 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 605 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 658 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 12:36:30,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 658 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-23 12:36:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 373. [2021-11-23 12:36:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 371 states have (on average 1.6954177897574123) internal successors, (629), 372 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 12:36:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 629 transitions. [2021-11-23 12:36:30,178 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 629 transitions. Word has length 51 [2021-11-23 12:36:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:30,178 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 629 transitions. [2021-11-23 12:36:30,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 12:36:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 629 transitions. [2021-11-23 12:36:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 12:36:30,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:30,182 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] [2021-11-23 12:36:30,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:36:30,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1957032419, now seen corresponding path program 1 times [2021-11-23 12:36:30,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:30,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435425262] [2021-11-23 12:36:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:30,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:30,276 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 12:36:30,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:30,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435425262] [2021-11-23 12:36:30,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435425262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:30,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:30,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:36:30,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103182312] [2021-11-23 12:36:30,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:30,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:36:30,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:36:30,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:36:30,279 INFO L87 Difference]: Start difference. First operand 373 states and 629 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 12:36:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:30,477 INFO L93 Difference]: Finished difference Result 1047 states and 1784 transitions. [2021-11-23 12:36:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:36:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-23 12:36:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:30,486 INFO L225 Difference]: With dead ends: 1047 [2021-11-23 12:36:30,486 INFO L226 Difference]: Without dead ends: 707 [2021-11-23 12:36:30,487 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 12:36:30,495 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 2896 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2896 SdHoareTripleChecker+Valid, 1239 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 12:36:30,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2896 Valid, 1239 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:36:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-23 12:36:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 373. [2021-11-23 12:36:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 371 states have (on average 1.692722371967655) internal successors, (628), 372 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 12:36:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 628 transitions. [2021-11-23 12:36:30,523 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 628 transitions. Word has length 53 [2021-11-23 12:36:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:30,525 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 628 transitions. [2021-11-23 12:36:30,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 12:36:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 628 transitions. [2021-11-23 12:36:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 12:36:30,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:30,528 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 12:36:30,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:36:30,529 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash -332620466, now seen corresponding path program 1 times [2021-11-23 12:36:30,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:30,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294374070] [2021-11-23 12:36:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:30,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:30,626 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 12:36:30,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:30,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294374070] [2021-11-23 12:36:30,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294374070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:30,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:30,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:36:30,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599673938] [2021-11-23 12:36:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:30,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:36:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:30,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:36:30,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:36:30,630 INFO L87 Difference]: Start difference. First operand 373 states and 628 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 12:36:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:30,780 INFO L93 Difference]: Finished difference Result 1054 states and 1790 transitions. [2021-11-23 12:36:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:36:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 12:36:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:30,786 INFO L225 Difference]: With dead ends: 1054 [2021-11-23 12:36:30,786 INFO L226 Difference]: Without dead ends: 714 [2021-11-23 12:36:30,787 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 12:36:30,788 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 2900 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2900 SdHoareTripleChecker+Valid, 1242 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 12:36:30,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2900 Valid, 1242 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:36:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-23 12:36:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 373. [2021-11-23 12:36:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 371 states have (on average 1.6900269541778976) internal successors, (627), 372 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 12:36:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 627 transitions. [2021-11-23 12:36:30,821 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 627 transitions. Word has length 54 [2021-11-23 12:36:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:30,821 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 627 transitions. [2021-11-23 12:36:30,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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 12:36:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 627 transitions. [2021-11-23 12:36:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 12:36:30,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:30,826 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] [2021-11-23 12:36:30,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:36:30,826 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1505827096, now seen corresponding path program 1 times [2021-11-23 12:36:30,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:30,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065901072] [2021-11-23 12:36:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:30,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:30,898 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 12:36:30,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065901072] [2021-11-23 12:36:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065901072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:30,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:30,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:30,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551840060] [2021-11-23 12:36:30,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:30,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:30,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:30,900 INFO L87 Difference]: Start difference. First operand 373 states and 627 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 12:36:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:30,942 INFO L93 Difference]: Finished difference Result 496 states and 821 transitions. [2021-11-23 12:36:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-23 12:36:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:30,946 INFO L225 Difference]: With dead ends: 496 [2021-11-23 12:36:30,946 INFO L226 Difference]: Without dead ends: 376 [2021-11-23 12:36:30,947 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 12:36:30,948 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 1 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1248 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 12:36:30,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1248 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-23 12:36:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 375. [2021-11-23 12:36:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 373 states have (on average 1.6863270777479893) internal successors, (629), 374 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 12:36:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 629 transitions. [2021-11-23 12:36:30,976 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 629 transitions. Word has length 55 [2021-11-23 12:36:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:30,978 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 629 transitions. [2021-11-23 12:36:30,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 12:36:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 629 transitions. [2021-11-23 12:36:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 12:36:30,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:30,980 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] [2021-11-23 12:36:30,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:36:30,980 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1959572934, now seen corresponding path program 1 times [2021-11-23 12:36:30,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:30,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181379604] [2021-11-23 12:36:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:30,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:31,056 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 12:36:31,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:31,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181379604] [2021-11-23 12:36:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181379604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:31,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:31,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:31,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419653670] [2021-11-23 12:36:31,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:31,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:31,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:31,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:31,058 INFO L87 Difference]: Start difference. First operand 375 states and 629 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 12:36:31,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:31,111 INFO L93 Difference]: Finished difference Result 997 states and 1697 transitions. [2021-11-23 12:36:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:31,111 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 12:36:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:31,116 INFO L225 Difference]: With dead ends: 997 [2021-11-23 12:36:31,116 INFO L226 Difference]: Without dead ends: 660 [2021-11-23 12:36:31,117 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 12:36:31,118 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 577 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1154 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 12:36:31,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 1154 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-23 12:36:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 540. [2021-11-23 12:36:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.7174721189591078) internal successors, (924), 539 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 12:36:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 924 transitions. [2021-11-23 12:36:31,156 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 924 transitions. Word has length 61 [2021-11-23 12:36:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:31,156 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 924 transitions. [2021-11-23 12:36:31,156 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 12:36:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 924 transitions. [2021-11-23 12:36:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 12:36:31,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:31,158 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] [2021-11-23 12:36:31,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:36:31,158 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1845865812, now seen corresponding path program 1 times [2021-11-23 12:36:31,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:31,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680105531] [2021-11-23 12:36:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:31,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:31,209 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 12:36:31,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680105531] [2021-11-23 12:36:31,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680105531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:36:31,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828556683] [2021-11-23 12:36:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:31,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:36:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:36:31,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:36:31,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:36:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:36:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:36:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:36:31,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:36:31,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828556683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:31,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:36:31,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 12:36:31,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464093423] [2021-11-23 12:36:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:31,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:31,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:31,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:36:31,637 INFO L87 Difference]: Start difference. First operand 540 states and 924 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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 12:36:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:31,686 INFO L93 Difference]: Finished difference Result 617 states and 1043 transitions. [2021-11-23 12:36:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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 62 [2021-11-23 12:36:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:31,690 INFO L225 Difference]: With dead ends: 617 [2021-11-23 12:36:31,691 INFO L226 Difference]: Without dead ends: 534 [2021-11-23 12:36:31,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:36:31,692 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 453 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:36:31,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 724 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-23 12:36:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-23 12:36:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.7166979362101313) internal successors, (915), 533 states have internal predecessors, (915), 0 states have call successors, (0), 0 states 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 12:36:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 915 transitions. [2021-11-23 12:36:31,741 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 915 transitions. Word has length 62 [2021-11-23 12:36:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:31,742 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 915 transitions. [2021-11-23 12:36:31,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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 12:36:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 915 transitions. [2021-11-23 12:36:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 12:36:31,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:31,746 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, 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 12:36:31,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:36:31,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:36:31,957 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:31,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1598962045, now seen corresponding path program 1 times [2021-11-23 12:36:31,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:31,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951098534] [2021-11-23 12:36:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:31,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:32,022 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 12:36:32,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951098534] [2021-11-23 12:36:32,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951098534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:36:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739951500] [2021-11-23 12:36:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:32,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:36:32,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:36:32,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:36:32,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:36:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:32,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:36:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:36:32,458 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 12:36:32,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:36:32,643 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 12:36:32,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739951500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:36:32,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:36:32,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 12:36:32,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227454694] [2021-11-23 12:36:32,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:36:32,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:36:32,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:32,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:36:32,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:36:32,647 INFO L87 Difference]: Start difference. First operand 534 states and 915 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 12:36:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:32,825 INFO L93 Difference]: Finished difference Result 1973 states and 3407 transitions. [2021-11-23 12:36:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:36:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 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 95 [2021-11-23 12:36:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:32,838 INFO L225 Difference]: With dead ends: 1973 [2021-11-23 12:36:32,838 INFO L226 Difference]: Without dead ends: 1859 [2021-11-23 12:36:32,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 187 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 12:36:32,841 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 2270 mSDsluCounter, 2981 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2270 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:36:32,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2270 Valid, 3597 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-11-23 12:36:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1517. [2021-11-23 12:36:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 1.7658311345646438) internal successors, (2677), 1516 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 12:36:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2677 transitions. [2021-11-23 12:36:32,947 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2677 transitions. Word has length 95 [2021-11-23 12:36:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:32,948 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 2677 transitions. [2021-11-23 12:36:32,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 12:36:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2677 transitions. [2021-11-23 12:36:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 12:36:32,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:32,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:32,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:36:33,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b216a8b4-75a4-4b2a-9a1e-8a06eb1cc725/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:36:33,181 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash 264616528, now seen corresponding path program 1 times [2021-11-23 12:36:33,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:33,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259465091] [2021-11-23 12:36:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:33,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:33,263 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 12:36:33,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:33,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259465091] [2021-11-23 12:36:33,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259465091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:33,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:33,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:33,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666144438] [2021-11-23 12:36:33,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:33,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:33,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:33,265 INFO L87 Difference]: Start difference. First operand 1517 states and 2677 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 12:36:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:33,434 INFO L93 Difference]: Finished difference Result 4028 states and 7133 transitions. [2021-11-23 12:36:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-23 12:36:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:33,450 INFO L225 Difference]: With dead ends: 4028 [2021-11-23 12:36:33,450 INFO L226 Difference]: Without dead ends: 2611 [2021-11-23 12:36:33,455 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 12:36:33,456 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 566 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1231 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 12:36:33,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1231 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-11-23 12:36:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2497. [2021-11-23 12:36:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 1.7732371794871795) internal successors, (4426), 2496 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states 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 12:36:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 4426 transitions. [2021-11-23 12:36:33,646 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 4426 transitions. Word has length 101 [2021-11-23 12:36:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:33,647 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 4426 transitions. [2021-11-23 12:36:33,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 12:36:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 4426 transitions. [2021-11-23 12:36:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 12:36:33,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:33,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:33,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:36:33,654 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash 95820944, now seen corresponding path program 1 times [2021-11-23 12:36:33,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:33,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572423134] [2021-11-23 12:36:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:33,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:33,727 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 12:36:33,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572423134] [2021-11-23 12:36:33,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572423134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:33,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:33,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:33,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598250426] [2021-11-23 12:36:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:33,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:33,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:33,730 INFO L87 Difference]: Start difference. First operand 2497 states and 4426 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:36:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:33,994 INFO L93 Difference]: Finished difference Result 6455 states and 11476 transitions. [2021-11-23 12:36:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:33,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-23 12:36:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:34,022 INFO L225 Difference]: With dead ends: 6455 [2021-11-23 12:36:34,022 INFO L226 Difference]: Without dead ends: 4148 [2021-11-23 12:36:34,026 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 12:36:34,027 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 564 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1222 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 12:36:34,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1222 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-11-23 12:36:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4034. [2021-11-23 12:36:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 4033 states have (on average 1.77783287875031) internal successors, (7170), 4033 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states 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 12:36:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 7170 transitions. [2021-11-23 12:36:34,348 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 7170 transitions. Word has length 102 [2021-11-23 12:36:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:34,349 INFO L470 AbstractCegarLoop]: Abstraction has 4034 states and 7170 transitions. [2021-11-23 12:36:34,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:36:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 7170 transitions. [2021-11-23 12:36:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 12:36:34,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:34,361 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:34,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:36:34,362 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:34,362 INFO L85 PathProgramCache]: Analyzing trace with hash -999850062, now seen corresponding path program 1 times [2021-11-23 12:36:34,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:34,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682197220] [2021-11-23 12:36:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:34,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:34,434 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 12:36:34,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:34,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682197220] [2021-11-23 12:36:34,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682197220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:34,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:34,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:34,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823399737] [2021-11-23 12:36:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:34,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:34,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:34,436 INFO L87 Difference]: Start difference. First operand 4034 states and 7170 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 12:36:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:34,808 INFO L93 Difference]: Finished difference Result 9759 states and 17358 transitions. [2021-11-23 12:36:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-23 12:36:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:34,849 INFO L225 Difference]: With dead ends: 9759 [2021-11-23 12:36:34,849 INFO L226 Difference]: Without dead ends: 6272 [2021-11-23 12:36:34,855 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 12:36:34,856 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 562 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1174 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 12:36:34,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1174 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2021-11-23 12:36:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 6158. [2021-11-23 12:36:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6158 states, 6157 states have (on average 1.7763521195387364) internal successors, (10937), 6157 states have internal predecessors, (10937), 0 states have call successors, (0), 0 states 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 12:36:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6158 states to 6158 states and 10937 transitions. [2021-11-23 12:36:35,312 INFO L78 Accepts]: Start accepts. Automaton has 6158 states and 10937 transitions. Word has length 103 [2021-11-23 12:36:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:35,313 INFO L470 AbstractCegarLoop]: Abstraction has 6158 states and 10937 transitions. [2021-11-23 12:36:35,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 12:36:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6158 states and 10937 transitions. [2021-11-23 12:36:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 12:36:35,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:35,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:36:35,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:36:35,329 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash -154390718, now seen corresponding path program 1 times [2021-11-23 12:36:35,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:35,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878507981] [2021-11-23 12:36:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:35,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:35,378 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 12:36:35,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:35,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878507981] [2021-11-23 12:36:35,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878507981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:35,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:35,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:35,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63735946] [2021-11-23 12:36:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:35,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:35,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:35,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:35,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:35,381 INFO L87 Difference]: Start difference. First operand 6158 states and 10937 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 12:36:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:35,957 INFO L93 Difference]: Finished difference Result 14582 states and 25905 transitions. [2021-11-23 12:36:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-23 12:36:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:36,007 INFO L225 Difference]: With dead ends: 14582 [2021-11-23 12:36:36,007 INFO L226 Difference]: Without dead ends: 9545 [2021-11-23 12:36:36,015 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 12:36:36,016 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 560 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1174 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 12:36:36,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1174 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2021-11-23 12:36:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 9431. [2021-11-23 12:36:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 1.7732767762460233) internal successors, (16722), 9430 states have internal predecessors, (16722), 0 states have call successors, (0), 0 states 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 12:36:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 16722 transitions. [2021-11-23 12:36:36,646 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 16722 transitions. Word has length 104 [2021-11-23 12:36:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:36,646 INFO L470 AbstractCegarLoop]: Abstraction has 9431 states and 16722 transitions. [2021-11-23 12:36:36,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 12:36:36,647 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 16722 transitions. [2021-11-23 12:36:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 12:36:36,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:36,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:36:36,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:36:36,669 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:36,670 INFO L85 PathProgramCache]: Analyzing trace with hash 59446466, now seen corresponding path program 1 times [2021-11-23 12:36:36,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:36,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856131896] [2021-11-23 12:36:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:36,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:36,719 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 12:36:36,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:36,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856131896] [2021-11-23 12:36:36,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856131896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:36,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:36,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:36,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480444019] [2021-11-23 12:36:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:36,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:36,723 INFO L87 Difference]: Start difference. First operand 9431 states and 16722 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 12:36:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:37,552 INFO L93 Difference]: Finished difference Result 23772 states and 42196 transitions. [2021-11-23 12:36:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-23 12:36:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:37,604 INFO L225 Difference]: With dead ends: 23772 [2021-11-23 12:36:37,604 INFO L226 Difference]: Without dead ends: 15910 [2021-11-23 12:36:37,616 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 12:36:37,617 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 558 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1230 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 12:36:37,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1230 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15910 states. [2021-11-23 12:36:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15910 to 15796. [2021-11-23 12:36:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15796 states, 15795 states have (on average 1.7716999050332383) internal successors, (27984), 15795 states have internal predecessors, (27984), 0 states have call successors, (0), 0 states 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 12:36:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 27984 transitions. [2021-11-23 12:36:38,681 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 27984 transitions. Word has length 105 [2021-11-23 12:36:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:38,682 INFO L470 AbstractCegarLoop]: Abstraction has 15796 states and 27984 transitions. [2021-11-23 12:36:38,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 12:36:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 27984 transitions. [2021-11-23 12:36:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 12:36:38,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:38,724 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, 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 12:36:38,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:36:38,725 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash -246244814, now seen corresponding path program 1 times [2021-11-23 12:36:38,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:38,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689239051] [2021-11-23 12:36:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:38,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:38,777 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 12:36:38,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:38,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689239051] [2021-11-23 12:36:38,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689239051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:38,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:38,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013029612] [2021-11-23 12:36:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:38,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:38,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:38,780 INFO L87 Difference]: Start difference. First operand 15796 states and 27984 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:36:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:40,055 INFO L93 Difference]: Finished difference Result 40344 states and 71704 transitions. [2021-11-23 12:36:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 12:36:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:40,146 INFO L225 Difference]: With dead ends: 40344 [2021-11-23 12:36:40,146 INFO L226 Difference]: Without dead ends: 26982 [2021-11-23 12:36:40,169 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 12:36:40,171 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 556 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1221 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 12:36:40,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 1221 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26982 states. [2021-11-23 12:36:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26982 to 26868. [2021-11-23 12:36:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26868 states, 26867 states have (on average 1.7741467227453753) internal successors, (47666), 26867 states have internal predecessors, (47666), 0 states have call successors, (0), 0 states 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 12:36:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26868 states to 26868 states and 47666 transitions. [2021-11-23 12:36:41,819 INFO L78 Accepts]: Start accepts. Automaton has 26868 states and 47666 transitions. Word has length 106 [2021-11-23 12:36:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:41,819 INFO L470 AbstractCegarLoop]: Abstraction has 26868 states and 47666 transitions. [2021-11-23 12:36:41,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:36:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 26868 states and 47666 transitions. [2021-11-23 12:36:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 12:36:41,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:41,870 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, 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 12:36:41,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:36:41,871 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1704673572, now seen corresponding path program 1 times [2021-11-23 12:36:41,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:41,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790630865] [2021-11-23 12:36:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:41,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:42,068 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 12:36:42,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790630865] [2021-11-23 12:36:42,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790630865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:42,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:42,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:42,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245174770] [2021-11-23 12:36:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:42,071 INFO L87 Difference]: Start difference. First operand 26868 states and 47666 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:36:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:44,180 INFO L93 Difference]: Finished difference Result 71649 states and 127299 transitions. [2021-11-23 12:36:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-23 12:36:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:44,344 INFO L225 Difference]: With dead ends: 71649 [2021-11-23 12:36:44,344 INFO L226 Difference]: Without dead ends: 48117 [2021-11-23 12:36:44,379 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 12:36:44,379 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 554 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1230 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 12:36:44,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 1230 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48117 states. [2021-11-23 12:36:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48117 to 48003. [2021-11-23 12:36:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48003 states, 48002 states have (on average 1.7722178242573225) internal successors, (85070), 48002 states have internal predecessors, (85070), 0 states have call successors, (0), 0 states 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 12:36:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48003 states to 48003 states and 85070 transitions. [2021-11-23 12:36:47,041 INFO L78 Accepts]: Start accepts. Automaton has 48003 states and 85070 transitions. Word has length 107 [2021-11-23 12:36:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:47,042 INFO L470 AbstractCegarLoop]: Abstraction has 48003 states and 85070 transitions. [2021-11-23 12:36:47,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:36:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 48003 states and 85070 transitions. [2021-11-23 12:36:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 12:36:47,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:47,103 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, 1, 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 12:36:47,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:36:47,103 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1277784294, now seen corresponding path program 1 times [2021-11-23 12:36:47,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:47,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768858759] [2021-11-23 12:36:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:47,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:47,158 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 12:36:47,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:47,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768858759] [2021-11-23 12:36:47,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768858759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:47,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:47,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:47,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905006256] [2021-11-23 12:36:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:47,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:47,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:47,162 INFO L87 Difference]: Start difference. First operand 48003 states and 85070 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 12:36:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:49,973 INFO L93 Difference]: Finished difference Result 122772 states and 217523 transitions. [2021-11-23 12:36:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-23 12:36:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:50,244 INFO L225 Difference]: With dead ends: 122772 [2021-11-23 12:36:50,245 INFO L226 Difference]: Without dead ends: 80373 [2021-11-23 12:36:50,307 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 12:36:50,307 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 552 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1174 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 12:36:50,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 1174 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80373 states. [2021-11-23 12:36:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80373 to 80259. [2021-11-23 12:36:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80259 states, 80258 states have (on average 1.7661541528570361) internal successors, (141748), 80258 states have internal predecessors, (141748), 0 states have call successors, (0), 0 states 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 12:36:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80259 states to 80259 states and 141748 transitions. [2021-11-23 12:36:54,245 INFO L78 Accepts]: Start accepts. Automaton has 80259 states and 141748 transitions. Word has length 108 [2021-11-23 12:36:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:36:54,245 INFO L470 AbstractCegarLoop]: Abstraction has 80259 states and 141748 transitions. [2021-11-23 12:36:54,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 12:36:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 80259 states and 141748 transitions. [2021-11-23 12:36:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 12:36:54,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:36:54,301 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, 1, 1, 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 12:36:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:36:54,301 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:36:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:36:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash 900786246, now seen corresponding path program 1 times [2021-11-23 12:36:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:36:54,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442802406] [2021-11-23 12:36:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:36:54,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:36:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:36:54,354 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 12:36:54,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:36:54,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442802406] [2021-11-23 12:36:54,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442802406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:36:54,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:36:54,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:36:54,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220360208] [2021-11-23 12:36:54,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:36:54,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:36:54,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:36:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:36:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:36:54,357 INFO L87 Difference]: Start difference. First operand 80259 states and 141748 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 12:36:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:36:59,245 INFO L93 Difference]: Finished difference Result 221214 states and 391865 transitions. [2021-11-23 12:36:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:36:59,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-23 12:36:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:36:59,558 INFO L225 Difference]: With dead ends: 221214 [2021-11-23 12:36:59,558 INFO L226 Difference]: Without dead ends: 148147 [2021-11-23 12:36:59,628 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 12:36:59,629 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 550 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1221 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 12:36:59,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1221 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:36:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148147 states. [2021-11-23 12:37:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148147 to 148033. [2021-11-23 12:37:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148033 states, 148032 states have (on average 1.768536532641591) internal successors, (261800), 148032 states have internal predecessors, (261800), 0 states have call successors, (0), 0 states 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 12:37:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148033 states to 148033 states and 261800 transitions. [2021-11-23 12:37:06,053 INFO L78 Accepts]: Start accepts. Automaton has 148033 states and 261800 transitions. Word has length 109 [2021-11-23 12:37:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:06,055 INFO L470 AbstractCegarLoop]: Abstraction has 148033 states and 261800 transitions. [2021-11-23 12:37:06,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 12:37:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 148033 states and 261800 transitions. [2021-11-23 12:37:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 12:37:06,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:06,147 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, 1, 1, 1, 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 12:37:06,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 12:37:06,148 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:06,148 INFO L85 PathProgramCache]: Analyzing trace with hash -197849130, now seen corresponding path program 1 times [2021-11-23 12:37:06,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:06,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139268548] [2021-11-23 12:37:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:06,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:06,202 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 12:37:06,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139268548] [2021-11-23 12:37:06,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139268548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:06,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:06,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:37:06,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492049069] [2021-11-23 12:37:06,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:06,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:37:06,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:37:06,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:37:06,205 INFO L87 Difference]: Start difference. First operand 148033 states and 261800 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)