./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF --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 4590079a5f8946ec9488ef76281079c2cb860e2f88ad1b21eefdd23ad59a57f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:34:11,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:34:11,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:34:11,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:34:11,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:34:11,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:34:11,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:34:11,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:34:11,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:34:11,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:34:11,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:34:11,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:34:11,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:34:11,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:34:11,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:34:11,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:34:11,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:34:11,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:34:11,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:34:11,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:34:11,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:34:11,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:34:11,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:34:11,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:34:11,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:34:11,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:34:11,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:34:11,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:34:11,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:34:11,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:34:11,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:34:11,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:34:11,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:34:11,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:34:11,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:34:11,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:34:11,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:34:11,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:34:11,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:34:11,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:34:11,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:34:11,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:34:11,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:34:11,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:34:11,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:34:11,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:34:11,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:34:11,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:34:11,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:34:11,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:34:11,243 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:34:11,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:34:11,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:34:11,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:34:11,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:34:11,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:34:11,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:34:11,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:34:11,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:34:11,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:34:11,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:34:11,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:34:11,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:34:11,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:34:11,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:34:11,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:34:11,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:34:11,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:34:11,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:34:11,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:34:11,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:34:11,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:34:11,247 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:34:11,247 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:34:11,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:34:11,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:34:11,248 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_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4590079a5f8946ec9488ef76281079c2cb860e2f88ad1b21eefdd23ad59a57f9 [2021-11-20 06:34:11,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:34:11,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:34:11,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:34:11,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:34:11,558 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:34:11,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2021-11-20 06:34:11,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/data/4b853ba6e/b52dd57aecf64dbbb2dad1528cebf893/FLAGfa412550f [2021-11-20 06:34:12,501 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:34:12,502 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2021-11-20 06:34:12,538 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/data/4b853ba6e/b52dd57aecf64dbbb2dad1528cebf893/FLAGfa412550f [2021-11-20 06:34:13,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/data/4b853ba6e/b52dd57aecf64dbbb2dad1528cebf893 [2021-11-20 06:34:13,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:34:13,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:34:13,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:34:13,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:34:13,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:34:13,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:34:13" (1/1) ... [2021-11-20 06:34:13,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a0cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:13, skipping insertion in model container [2021-11-20 06:34:13,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:34:13" (1/1) ... [2021-11-20 06:34:13,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:34:13,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:34:13,466 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_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/sv-benchmarks/c/eca-rers2012/Problem12_label44.c[6250,6263] [2021-11-20 06:34:14,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:34:14,529 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:34:14,569 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_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/sv-benchmarks/c/eca-rers2012/Problem12_label44.c[6250,6263] [2021-11-20 06:34:15,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:34:15,256 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:34:15,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15 WrapperNode [2021-11-20 06:34:15,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:34:15,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:34:15,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:34:15,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:34:15,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,666 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-20 06:34:15,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:34:15,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:34:15,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:34:15,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:34:15,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:15,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:16,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:34:16,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:34:16,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:34:16,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:34:16,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (1/1) ... [2021-11-20 06:34:16,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:34:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:16,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:34:16,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:34:16,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:34:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:34:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:34:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:34:16,231 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:34:16,233 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:34:20,578 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:34:20,604 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:34:20,605 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:34:20,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:34:20 BoogieIcfgContainer [2021-11-20 06:34:20,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:34:20,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:34:20,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:34:20,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:34:20,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:34:13" (1/3) ... [2021-11-20 06:34:20,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb18120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:34:20, skipping insertion in model container [2021-11-20 06:34:20,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:34:15" (2/3) ... [2021-11-20 06:34:20,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb18120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:34:20, skipping insertion in model container [2021-11-20 06:34:20,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:34:20" (3/3) ... [2021-11-20 06:34:20,618 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label44.c [2021-11-20 06:34:20,623 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:34:20,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:34:20,692 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:34:20,699 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 [2021-11-20 06:34:20,699 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:34:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:34:20,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:20,752 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] [2021-11-20 06:34:20,752 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:20,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-11-20 06:34:20,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:20,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327060399] [2021-11-20 06:34:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:20,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:21,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327060399] [2021-11-20 06:34:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327060399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:21,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:21,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:34:21,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184556512] [2021-11-20 06:34:21,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:21,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:34:21,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:34:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:34:21,058 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 16.666666666666668) internal successors, (50), 2 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) [2021-11-20 06:34:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:24,999 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-20 06:34:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:34:25,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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 [2021-11-20 06:34:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:25,042 INFO L225 Difference]: With dead ends: 2388 [2021-11-20 06:34:25,042 INFO L226 Difference]: Without dead ends: 1506 [2021-11-20 06:34:25,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:34:25,058 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 784 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:25,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 06:34:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-20 06:34:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-20 06:34:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-11-20 06:34:25,195 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 50 [2021-11-20 06:34:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:25,196 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-11-20 06:34:25,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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) [2021-11-20 06:34:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-11-20 06:34:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:34:25,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:25,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:25,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:34:25,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:25,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1850963095, now seen corresponding path program 1 times [2021-11-20 06:34:25,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:25,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827245503] [2021-11-20 06:34:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:25,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:25,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:25,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827245503] [2021-11-20 06:34:25,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827245503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:25,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:25,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:34:25,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708768980] [2021-11-20 06:34:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:25,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:34:25,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:34:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:25,547 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:30,569 INFO L93 Difference]: Finished difference Result 4549 states and 7430 transitions. [2021-11-20 06:34:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:34:30,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-20 06:34:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:30,590 INFO L225 Difference]: With dead ends: 4549 [2021-11-20 06:34:30,590 INFO L226 Difference]: Without dead ends: 3008 [2021-11-20 06:34:30,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:30,599 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3732 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 4396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 3732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:30,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 656 Invalid, 4396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 3732 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 06:34:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-20 06:34:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-11-20 06:34:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.341536415031593) internal successors, (4034), 3007 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4034 transitions. [2021-11-20 06:34:30,675 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4034 transitions. Word has length 121 [2021-11-20 06:34:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:30,678 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4034 transitions. [2021-11-20 06:34:30,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4034 transitions. [2021-11-20 06:34:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:34:30,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:30,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:30,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:34:30,689 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:30,691 INFO L85 PathProgramCache]: Analyzing trace with hash -938273718, now seen corresponding path program 1 times [2021-11-20 06:34:30,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303954974] [2021-11-20 06:34:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:30,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:30,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:30,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303954974] [2021-11-20 06:34:30,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303954974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:30,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:30,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:34:30,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239657677] [2021-11-20 06:34:30,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:30,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:34:30,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:34:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:30,944 INFO L87 Difference]: Start difference. First operand 3008 states and 4034 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:35,640 INFO L93 Difference]: Finished difference Result 9769 states and 12892 transitions. [2021-11-20 06:34:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:34:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-20 06:34:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:35,679 INFO L225 Difference]: With dead ends: 9769 [2021-11-20 06:34:35,679 INFO L226 Difference]: Without dead ends: 6763 [2021-11-20 06:34:35,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:34:35,686 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 2093 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4273 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 4273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:35,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2093 Valid, 452 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 4273 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 06:34:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-11-20 06:34:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2021-11-20 06:34:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.287341023365868) internal successors, (8705), 6762 states have internal predecessors, (8705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8705 transitions. [2021-11-20 06:34:35,889 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8705 transitions. Word has length 159 [2021-11-20 06:34:35,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:35,889 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 8705 transitions. [2021-11-20 06:34:35,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8705 transitions. [2021-11-20 06:34:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-20 06:34:35,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:35,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:35,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:34:35,896 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash -341145559, now seen corresponding path program 1 times [2021-11-20 06:34:35,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:35,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872835449] [2021-11-20 06:34:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:35,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:34:36,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872835449] [2021-11-20 06:34:36,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872835449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:36,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:36,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:34:36,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768425510] [2021-11-20 06:34:36,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:36,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:34:36,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:34:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:36,093 INFO L87 Difference]: Start difference. First operand 6763 states and 8705 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:40,211 INFO L93 Difference]: Finished difference Result 15816 states and 21393 transitions. [2021-11-20 06:34:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:34:40,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 262 [2021-11-20 06:34:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:40,278 INFO L225 Difference]: With dead ends: 15816 [2021-11-20 06:34:40,278 INFO L226 Difference]: Without dead ends: 9769 [2021-11-20 06:34:40,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:40,296 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:40,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 492 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 06:34:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2021-11-20 06:34:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2021-11-20 06:34:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.272987917263977) internal successors, (12432), 9766 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12432 transitions. [2021-11-20 06:34:40,544 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12432 transitions. Word has length 262 [2021-11-20 06:34:40,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:40,546 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12432 transitions. [2021-11-20 06:34:40,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12432 transitions. [2021-11-20 06:34:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-20 06:34:40,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:40,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:40,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:34:40,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash -533867888, now seen corresponding path program 1 times [2021-11-20 06:34:40,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:40,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76866163] [2021-11-20 06:34:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:40,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 41 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:40,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:40,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76866163] [2021-11-20 06:34:40,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76866163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:34:40,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744785405] [2021-11-20 06:34:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:40,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:40,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:40,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:40,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:34:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:34:41,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:34:41,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:34:41,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744785405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:41,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:34:41,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-20 06:34:41,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224743248] [2021-11-20 06:34:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:41,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:34:41,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:34:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:34:41,630 INFO L87 Difference]: Start difference. First operand 9767 states and 12432 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:45,237 INFO L93 Difference]: Finished difference Result 24789 states and 32538 transitions. [2021-11-20 06:34:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:34:45,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 280 [2021-11-20 06:34:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:45,311 INFO L225 Difference]: With dead ends: 24789 [2021-11-20 06:34:45,311 INFO L226 Difference]: Without dead ends: 15775 [2021-11-20 06:34:45,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:34:45,324 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 718 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:45,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 574 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:34:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2021-11-20 06:34:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 15775. [2021-11-20 06:34:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2571953848104476) internal successors, (19831), 15774 states have internal predecessors, (19831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19831 transitions. [2021-11-20 06:34:45,701 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19831 transitions. Word has length 280 [2021-11-20 06:34:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:45,704 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19831 transitions. [2021-11-20 06:34:45,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19831 transitions. [2021-11-20 06:34:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-20 06:34:45,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:45,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:45,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:45,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ded6d90-ec11-47e9-ba6b-c40cea9a4386/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:45,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash 235587452, now seen corresponding path program 1 times [2021-11-20 06:34:45,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:45,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353495055] [2021-11-20 06:34:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:45,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 06:34:46,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:46,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353495055] [2021-11-20 06:34:46,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353495055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:46,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:46,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:34:46,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753349911] [2021-11-20 06:34:46,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:46,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:34:46,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:34:46,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:34:46,099 INFO L87 Difference]: Start difference. First operand 15775 states and 19831 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:49,172 INFO L93 Difference]: Finished difference Result 44315 states and 56348 transitions. [2021-11-20 06:34:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:34:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 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 288 [2021-11-20 06:34:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:49,231 INFO L225 Difference]: With dead ends: 44315 [2021-11-20 06:34:49,231 INFO L226 Difference]: Without dead ends: 29293 [2021-11-20 06:34:49,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:34:49,248 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 690 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:49,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 422 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:34:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29293 states. [2021-11-20 06:34:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29293 to 26289. [2021-11-20 06:34:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26289 states, 26288 states have (on average 1.1972382836275106) internal successors, (31473), 26288 states have internal predecessors, (31473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26289 states to 26289 states and 31473 transitions. [2021-11-20 06:34:49,722 INFO L78 Accepts]: Start accepts. Automaton has 26289 states and 31473 transitions. Word has length 288 [2021-11-20 06:34:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:49,723 INFO L470 AbstractCegarLoop]: Abstraction has 26289 states and 31473 transitions. [2021-11-20 06:34:49,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 26289 states and 31473 transitions. [2021-11-20 06:34:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-11-20 06:34:49,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:49,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:49,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:34:49,735 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1718673054, now seen corresponding path program 1 times [2021-11-20 06:34:49,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:49,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665695441] [2021-11-20 06:34:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:49,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-20 06:34:49,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665695441] [2021-11-20 06:34:49,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665695441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:49,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:49,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:34:49,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239981852] [2021-11-20 06:34:49,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:49,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:34:49,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:34:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:34:49,939 INFO L87 Difference]: Start difference. First operand 26289 states and 31473 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:53,429 INFO L93 Difference]: Finished difference Result 65343 states and 79632 transitions. [2021-11-20 06:34:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:34:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 401 [2021-11-20 06:34:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:53,510 INFO L225 Difference]: With dead ends: 65343 [2021-11-20 06:34:53,510 INFO L226 Difference]: Without dead ends: 39807 [2021-11-20 06:34:53,539 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 [2021-11-20 06:34:53,540 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 679 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:53,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1247 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 06:34:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39807 states. [2021-11-20 06:34:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39807 to 37554. [2021-11-20 06:34:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37554 states, 37553 states have (on average 1.1675764918914602) internal successors, (43846), 37553 states have internal predecessors, (43846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37554 states to 37554 states and 43846 transitions. [2021-11-20 06:34:54,210 INFO L78 Accepts]: Start accepts. Automaton has 37554 states and 43846 transitions. Word has length 401 [2021-11-20 06:34:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:54,211 INFO L470 AbstractCegarLoop]: Abstraction has 37554 states and 43846 transitions. [2021-11-20 06:34:54,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 37554 states and 43846 transitions. [2021-11-20 06:34:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-11-20 06:34:54,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:54,223 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:54,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:34:54,224 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:54,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1114491564, now seen corresponding path program 1 times [2021-11-20 06:34:54,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:54,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466871924] [2021-11-20 06:34:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:54,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:34:54,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466871924] [2021-11-20 06:34:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466871924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:54,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:54,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:34:54,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699723706] [2021-11-20 06:34:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:34:54,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:54,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:34:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:34:54,550 INFO L87 Difference]: Start difference. First operand 37554 states and 43846 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:58,373 INFO L93 Difference]: Finished difference Result 88624 states and 105173 transitions. [2021-11-20 06:34:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:34:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 405 [2021-11-20 06:34:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:58,468 INFO L225 Difference]: With dead ends: 88624 [2021-11-20 06:34:58,469 INFO L226 Difference]: Without dead ends: 51823 [2021-11-20 06:34:58,491 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 [2021-11-20 06:34:58,492 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 673 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:58,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1285 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 06:34:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51823 states. [2021-11-20 06:34:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51823 to 51823. [2021-11-20 06:34:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51823 states, 51822 states have (on average 1.1399791594303577) internal successors, (59076), 51822 states have internal predecessors, (59076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51823 states to 51823 states and 59076 transitions. [2021-11-20 06:34:59,585 INFO L78 Accepts]: Start accepts. Automaton has 51823 states and 59076 transitions. Word has length 405 [2021-11-20 06:34:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:59,586 INFO L470 AbstractCegarLoop]: Abstraction has 51823 states and 59076 transitions. [2021-11-20 06:34:59,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 51823 states and 59076 transitions. [2021-11-20 06:34:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-11-20 06:34:59,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:59,601 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:59,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:34:59,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1052886306, now seen corresponding path program 1 times [2021-11-20 06:34:59,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:59,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275606447] [2021-11-20 06:34:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:59,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-20 06:34:59,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:59,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275606447] [2021-11-20 06:34:59,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275606447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:59,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:59,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:34:59,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380625499] [2021-11-20 06:34:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:59,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:34:59,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:34:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:34:59,999 INFO L87 Difference]: Start difference. First operand 51823 states and 59076 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:03,458 INFO L93 Difference]: Finished difference Result 112656 states and 128253 transitions. [2021-11-20 06:35:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:35:03,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 409 [2021-11-20 06:35:03,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:03,552 INFO L225 Difference]: With dead ends: 112656 [2021-11-20 06:35:03,552 INFO L226 Difference]: Without dead ends: 61586 [2021-11-20 06:35:03,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:35:03,586 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 818 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:03,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 900 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:35:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61586 states. [2021-11-20 06:35:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61586 to 57831. [2021-11-20 06:35:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57831 states, 57830 states have (on average 1.1201625453916653) internal successors, (64779), 57830 states have internal predecessors, (64779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57831 states to 57831 states and 64779 transitions. [2021-11-20 06:35:04,504 INFO L78 Accepts]: Start accepts. Automaton has 57831 states and 64779 transitions. Word has length 409 [2021-11-20 06:35:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:04,505 INFO L470 AbstractCegarLoop]: Abstraction has 57831 states and 64779 transitions. [2021-11-20 06:35:04,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 57831 states and 64779 transitions. [2021-11-20 06:35:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-11-20 06:35:04,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:04,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:35:04,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:35:04,527 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 684792886, now seen corresponding path program 1 times [2021-11-20 06:35:04,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:04,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073956221] [2021-11-20 06:35:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:04,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 06:35:04,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:04,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073956221] [2021-11-20 06:35:04,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073956221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:04,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:04,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:35:04,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447547185] [2021-11-20 06:35:04,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:04,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:35:04,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:35:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:35:04,740 INFO L87 Difference]: Start difference. First operand 57831 states and 64779 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:08,641 INFO L93 Difference]: Finished difference Result 137441 states and 155327 transitions. [2021-11-20 06:35:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:35:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2021-11-20 06:35:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:08,747 INFO L225 Difference]: With dead ends: 137441 [2021-11-20 06:35:08,747 INFO L226 Difference]: Without dead ends: 80363 [2021-11-20 06:35:08,779 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 [2021-11-20 06:35:08,780 INFO L933 BasicCegarLoop]: 1260 mSDtfsCounter, 699 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:08,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 1268 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 06:35:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80363 states. [2021-11-20 06:35:09,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80363 to 75104. [2021-11-20 06:35:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75104 states, 75103 states have (on average 1.1095162643303198) internal successors, (83328), 75103 states have internal predecessors, (83328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75104 states to 75104 states and 83328 transitions. [2021-11-20 06:35:10,253 INFO L78 Accepts]: Start accepts. Automaton has 75104 states and 83328 transitions. Word has length 468 [2021-11-20 06:35:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:10,253 INFO L470 AbstractCegarLoop]: Abstraction has 75104 states and 83328 transitions. [2021-11-20 06:35:10,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 75104 states and 83328 transitions. [2021-11-20 06:35:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-20 06:35:10,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:10,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:10,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:35:10,274 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1938920774, now seen corresponding path program 1 times [2021-11-20 06:35:10,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:10,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072228570] [2021-11-20 06:35:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:10,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 06:35:10,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:10,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072228570] [2021-11-20 06:35:10,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072228570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:10,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:10,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:35:10,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432391320] [2021-11-20 06:35:10,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:10,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:35:10,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:35:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:35:10,520 INFO L87 Difference]: Start difference. First operand 75104 states and 83328 transitions. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:14,605 INFO L93 Difference]: Finished difference Result 187756 states and 208094 transitions. [2021-11-20 06:35:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:35:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 484 [2021-11-20 06:35:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:14,955 INFO L225 Difference]: With dead ends: 187756 [2021-11-20 06:35:14,955 INFO L226 Difference]: Without dead ends: 113405 [2021-11-20 06:35:15,001 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 [2021-11-20 06:35:15,002 INFO L933 BasicCegarLoop]: 1214 mSDtfsCounter, 564 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:15,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1222 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 06:35:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113405 states. [2021-11-20 06:35:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113405 to 108899. [2021-11-20 06:35:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108899 states, 108898 states have (on average 1.102591415820309) internal successors, (120070), 108898 states have internal predecessors, (120070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108899 states to 108899 states and 120070 transitions. [2021-11-20 06:35:16,404 INFO L78 Accepts]: Start accepts. Automaton has 108899 states and 120070 transitions. Word has length 484 [2021-11-20 06:35:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:16,405 INFO L470 AbstractCegarLoop]: Abstraction has 108899 states and 120070 transitions. [2021-11-20 06:35:16,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 108899 states and 120070 transitions. [2021-11-20 06:35:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-11-20 06:35:16,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:16,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:16,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:35:16,422 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1393823655, now seen corresponding path program 1 times [2021-11-20 06:35:16,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:16,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825707773] [2021-11-20 06:35:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:16,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-20 06:35:16,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825707773] [2021-11-20 06:35:16,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825707773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:16,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:16,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:35:16,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067433751] [2021-11-20 06:35:16,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:16,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:35:16,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:35:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:35:16,640 INFO L87 Difference]: Start difference. First operand 108899 states and 120070 transitions. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:20,983 INFO L93 Difference]: Finished difference Result 265860 states and 295601 transitions. [2021-11-20 06:35:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:35:20,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 521 [2021-11-20 06:35:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:21,174 INFO L225 Difference]: With dead ends: 265860 [2021-11-20 06:35:21,175 INFO L226 Difference]: Without dead ends: 157714 [2021-11-20 06:35:21,223 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 [2021-11-20 06:35:21,224 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 610 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:21,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 1281 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:35:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157714 states. [2021-11-20 06:35:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157714 to 147951. [2021-11-20 06:35:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147951 states, 147950 states have (on average 1.0928556944913823) internal successors, (161688), 147950 states have internal predecessors, (161688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147951 states to 147951 states and 161688 transitions. [2021-11-20 06:35:23,663 INFO L78 Accepts]: Start accepts. Automaton has 147951 states and 161688 transitions. Word has length 521 [2021-11-20 06:35:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:23,664 INFO L470 AbstractCegarLoop]: Abstraction has 147951 states and 161688 transitions. [2021-11-20 06:35:23,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 147951 states and 161688 transitions. [2021-11-20 06:35:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-11-20 06:35:23,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:23,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:23,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:35:23,699 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1416325111, now seen corresponding path program 1 times [2021-11-20 06:35:23,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045587685] [2021-11-20 06:35:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:23,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-20 06:35:24,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:24,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045587685] [2021-11-20 06:35:24,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045587685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:24,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:24,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:35:24,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213292902] [2021-11-20 06:35:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:24,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:35:24,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:35:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:35:24,069 INFO L87 Difference]: Start difference. First operand 147951 states and 161688 transitions. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:32,255 INFO L93 Difference]: Finished difference Result 444600 states and 486840 transitions. [2021-11-20 06:35:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:35:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 628 [2021-11-20 06:35:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:32,680 INFO L225 Difference]: With dead ends: 444600 [2021-11-20 06:35:32,681 INFO L226 Difference]: Without dead ends: 297402 [2021-11-20 06:35:32,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:35:32,758 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1629 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 5492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 4975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:32,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1629 Valid, 77 Invalid, 5492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 4975 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-20 06:35:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297402 states. [2021-11-20 06:35:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297402 to 295147. [2021-11-20 06:35:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295147 states, 295146 states have (on average 1.091432714656475) internal successors, (322132), 295146 states have internal predecessors, (322132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295147 states to 295147 states and 322132 transitions. [2021-11-20 06:35:37,926 INFO L78 Accepts]: Start accepts. Automaton has 295147 states and 322132 transitions. Word has length 628 [2021-11-20 06:35:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:37,927 INFO L470 AbstractCegarLoop]: Abstraction has 295147 states and 322132 transitions. [2021-11-20 06:35:37,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 295147 states and 322132 transitions. [2021-11-20 06:35:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2021-11-20 06:35:37,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:37,964 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:37,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:35:37,965 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1226073397, now seen corresponding path program 1 times [2021-11-20 06:35:37,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:37,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358760236] [2021-11-20 06:35:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:37,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-20 06:35:38,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:38,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358760236] [2021-11-20 06:35:38,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358760236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:38,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:38,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:35:38,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664640867] [2021-11-20 06:35:38,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:38,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:35:38,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:38,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:35:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:35:38,326 INFO L87 Difference]: Start difference. First operand 295147 states and 322132 transitions. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:48,147 INFO L93 Difference]: Finished difference Result 719466 states and 787580 transitions. [2021-11-20 06:35:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:35:48,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 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 650 [2021-11-20 06:35:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:49,084 INFO L225 Difference]: With dead ends: 719466 [2021-11-20 06:35:49,084 INFO L226 Difference]: Without dead ends: 425072 [2021-11-20 06:35:49,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:35:49,281 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 1310 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4816 mSolverCounterSat, 1162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 5978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1162 IncrementalHoareTripleChecker+Valid, 4816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:49,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 232 Invalid, 5978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1162 Valid, 4816 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-20 06:35:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425072 states. [2021-11-20 06:35:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425072 to 385267. [2021-11-20 06:35:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385267 states, 385266 states have (on average 1.0960609033758495) internal successors, (422275), 385266 states have internal predecessors, (422275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385267 states to 385267 states and 422275 transitions. [2021-11-20 06:35:56,431 INFO L78 Accepts]: Start accepts. Automaton has 385267 states and 422275 transitions. Word has length 650 [2021-11-20 06:35:56,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:56,433 INFO L470 AbstractCegarLoop]: Abstraction has 385267 states and 422275 transitions. [2021-11-20 06:35:56,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:35:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 385267 states and 422275 transitions. [2021-11-20 06:35:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-20 06:35:56,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:56,538 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:56,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:35:56,539 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:35:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 817068481, now seen corresponding path program 1 times [2021-11-20 06:35:56,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:35:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996205441] [2021-11-20 06:35:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:56,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:35:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1269 backedges. 1109 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-20 06:35:56,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:35:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996205441] [2021-11-20 06:35:56,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996205441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:35:56,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:35:56,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:35:56,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643727985] [2021-11-20 06:35:56,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:35:56,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:35:56,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:35:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:35:56,982 INFO L87 Difference]: Start difference. First operand 385267 states and 422275 transitions. Second operand has 4 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)