./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y --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 78a96934dff25285973ef889167a345947d7e73ab8a2ec405d96bd61e690530f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:17:51,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:17:51,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:17:51,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:17:51,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:17:51,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:17:51,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:17:51,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:17:51,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:17:51,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:17:51,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:17:51,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:17:51,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:17:51,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:17:51,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:17:51,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:17:51,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:17:51,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:17:51,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:17:51,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:17:51,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:17:51,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:17:51,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:17:51,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:17:51,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:17:51,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:17:51,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:17:51,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:17:51,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:17:51,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:17:51,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:17:51,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:17:51,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:17:51,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:17:51,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:17:51,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:17:51,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:17:51,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:17:51,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:17:51,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:17:51,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:17:51,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:17:51,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:17:51,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:17:51,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:17:51,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:17:51,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:17:51,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:17:51,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:17:51,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:17:51,311 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:17:51,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:17:51,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:17:51,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:17:51,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:17:51,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:17:51,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:17:51,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:17:51,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:17:51,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:17:51,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:17:51,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:17:51,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:17:51,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:17:51,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:17:51,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:17:51,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:17:51,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:17:51,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:17:51,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:17:51,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:17:51,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:17:51,319 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:17:51,320 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:17:51,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:17:51,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:17:51,320 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_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78a96934dff25285973ef889167a345947d7e73ab8a2ec405d96bd61e690530f [2021-11-13 18:17:51,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:17:51,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:17:51,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:17:51,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:17:51,653 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:17:51,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/systemc/token_ring.14.cil.c [2021-11-13 18:17:51,737 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/data/c9a2a636b/0f8785752386421596b6e4f920178094/FLAG0d703bb7b [2021-11-13 18:17:52,437 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:17:52,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/sv-benchmarks/c/systemc/token_ring.14.cil.c [2021-11-13 18:17:52,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/data/c9a2a636b/0f8785752386421596b6e4f920178094/FLAG0d703bb7b [2021-11-13 18:17:52,718 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/data/c9a2a636b/0f8785752386421596b6e4f920178094 [2021-11-13 18:17:52,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:17:52,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:17:52,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:17:52,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:17:52,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:17:52,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:17:52" (1/1) ... [2021-11-13 18:17:52,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a290460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:52, skipping insertion in model container [2021-11-13 18:17:52,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:17:52" (1/1) ... [2021-11-13 18:17:52,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:17:52,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:17:53,015 WARN L228 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_db1de39c-246b-4ce0-8da0-5404f6bdb501/sv-benchmarks/c/systemc/token_ring.14.cil.c[669,682] [2021-11-13 18:17:53,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:17:53,301 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:17:53,318 WARN L228 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_db1de39c-246b-4ce0-8da0-5404f6bdb501/sv-benchmarks/c/systemc/token_ring.14.cil.c[669,682] [2021-11-13 18:17:53,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:17:53,448 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:17:53,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53 WrapperNode [2021-11-13 18:17:53,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:17:53,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:17:53,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:17:53,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:17:53,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:17:53,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:17:53,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:17:53,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:17:53,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:17:53,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:17:53,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:17:53,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:17:53,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (1/1) ... [2021-11-13 18:17:53,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:17:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:17:53,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:17:53,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:17:53,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:17:53,703 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 18:17:53,703 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 18:17:53,704 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 18:17:53,704 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 18:17:53,704 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 18:17:53,704 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 18:17:53,705 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 18:17:53,705 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 18:17:53,705 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 18:17:53,705 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 18:17:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 18:17:53,706 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 18:17:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 18:17:53,706 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 18:17:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:17:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:17:53,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:17:55,079 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:17:55,079 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-13 18:17:55,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:17:55 BoogieIcfgContainer [2021-11-13 18:17:55,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:17:55,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:17:55,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:17:55,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:17:55,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:17:52" (1/3) ... [2021-11-13 18:17:55,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b92fe88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:17:55, skipping insertion in model container [2021-11-13 18:17:55,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:17:53" (2/3) ... [2021-11-13 18:17:55,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b92fe88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:17:55, skipping insertion in model container [2021-11-13 18:17:55,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:17:55" (3/3) ... [2021-11-13 18:17:55,093 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.14.cil.c [2021-11-13 18:17:55,099 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:17:55,099 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:17:55,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:17:55,168 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 [2021-11-13 18:17:55,168 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:17:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 388 states, 351 states have (on average 1.6666666666666667) internal successors, (585), 355 states have internal predecessors, (585), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 18:17:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:17:55,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:17:55,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:17:55,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:17:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:17:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1762805705, now seen corresponding path program 1 times [2021-11-13 18:17:55,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:17:55,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638563521] [2021-11-13 18:17:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:17:55,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:17:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:55,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:17:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:55,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:17:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:55,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:17:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:17:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:55,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:17:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:17:55,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:17:55,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638563521] [2021-11-13 18:17:55,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638563521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:17:55,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:17:55,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:17:55,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012934874] [2021-11-13 18:17:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:17:55,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:17:55,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:17:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:17:56,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:17:56,013 INFO L87 Difference]: Start difference. First operand has 388 states, 351 states have (on average 1.6666666666666667) internal successors, (585), 355 states have internal predecessors, (585), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:17:58,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:17:58,448 INFO L93 Difference]: Finished difference Result 906 states and 1510 transitions. [2021-11-13 18:17:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:17:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:17:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:17:58,484 INFO L225 Difference]: With dead ends: 906 [2021-11-13 18:17:58,484 INFO L226 Difference]: Without dead ends: 524 [2021-11-13 18:17:58,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:17:58,499 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 1040 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1592.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 69.88ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1822.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:17:58,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 1095 Invalid, 767 Unknown, 0 Unchecked, 69.88ms Time], IncrementalHoareTripleChecker [64 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1822.94ms Time] [2021-11-13 18:17:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-13 18:17:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 382. [2021-11-13 18:17:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.579250720461095) internal successors, (548), 349 states have internal predecessors, (548), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:17:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 602 transitions. [2021-11-13 18:17:58,688 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 602 transitions. Word has length 178 [2021-11-13 18:17:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:17:58,689 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 602 transitions. [2021-11-13 18:17:58,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:17:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 602 transitions. [2021-11-13 18:17:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:17:58,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:17:58,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:17:58,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:17:58,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:17:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:17:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1124435641, now seen corresponding path program 1 times [2021-11-13 18:17:58,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:17:58,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696256365] [2021-11-13 18:17:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:17:58,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:17:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:17:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:58,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:17:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:58,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:17:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:59,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:17:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:59,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:17:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:17:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:17:59,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:17:59,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696256365] [2021-11-13 18:17:59,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696256365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:17:59,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:17:59,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:17:59,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287383502] [2021-11-13 18:17:59,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:17:59,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:17:59,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:17:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:17:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:17:59,103 INFO L87 Difference]: Start difference. First operand 382 states and 602 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:01,017 INFO L93 Difference]: Finished difference Result 888 states and 1418 transitions. [2021-11-13 18:18:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:18:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:01,025 INFO L225 Difference]: With dead ends: 888 [2021-11-13 18:18:01,025 INFO L226 Difference]: Without dead ends: 524 [2021-11-13 18:18:01,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:18:01,029 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1027 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1338.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.84ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1544.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:01,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 1081 Invalid, 766 Unknown, 0 Unchecked, 29.84ms Time], IncrementalHoareTripleChecker [64 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1544.75ms Time] [2021-11-13 18:18:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-13 18:18:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 382. [2021-11-13 18:18:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5763688760806915) internal successors, (547), 349 states have internal predecessors, (547), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 601 transitions. [2021-11-13 18:18:01,091 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 601 transitions. Word has length 178 [2021-11-13 18:18:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:01,091 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 601 transitions. [2021-11-13 18:18:01,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 601 transitions. [2021-11-13 18:18:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:01,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:01,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:01,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:18:01,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1791817531, now seen corresponding path program 1 times [2021-11-13 18:18:01,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:01,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115007485] [2021-11-13 18:18:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:01,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:01,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:01,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:01,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:01,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:01,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115007485] [2021-11-13 18:18:01,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115007485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:01,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:01,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:18:01,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502940411] [2021-11-13 18:18:01,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:01,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:18:01,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:01,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:18:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:18:01,323 INFO L87 Difference]: Start difference. First operand 382 states and 601 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:03,818 INFO L93 Difference]: Finished difference Result 885 states and 1414 transitions. [2021-11-13 18:18:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:18:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:03,823 INFO L225 Difference]: With dead ends: 885 [2021-11-13 18:18:03,823 INFO L226 Difference]: Without dead ends: 523 [2021-11-13 18:18:03,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:18:03,827 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1021 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1826.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.29ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2140.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:03,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1041 Valid, 1296 Invalid, 1393 Unknown, 0 Unchecked, 31.29ms Time], IncrementalHoareTripleChecker [70 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 2140.86ms Time] [2021-11-13 18:18:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-13 18:18:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 382. [2021-11-13 18:18:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5734870317002883) internal successors, (546), 349 states have internal predecessors, (546), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 600 transitions. [2021-11-13 18:18:03,881 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 600 transitions. Word has length 178 [2021-11-13 18:18:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:03,881 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 600 transitions. [2021-11-13 18:18:03,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 600 transitions. [2021-11-13 18:18:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:03,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:03,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:03,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:18:03,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash -810862717, now seen corresponding path program 1 times [2021-11-13 18:18:03,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:03,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002242192] [2021-11-13 18:18:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:03,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:03,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:04,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:04,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:04,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:04,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002242192] [2021-11-13 18:18:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002242192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:04,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:04,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:04,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500323954] [2021-11-13 18:18:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:04,081 INFO L87 Difference]: Start difference. First operand 382 states and 600 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:06,335 INFO L93 Difference]: Finished difference Result 910 states and 1461 transitions. [2021-11-13 18:18:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:06,341 INFO L225 Difference]: With dead ends: 910 [2021-11-13 18:18:06,341 INFO L226 Difference]: Without dead ends: 548 [2021-11-13 18:18:06,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:06,349 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 1281 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1560.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.78ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1890.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:06,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 1414 Invalid, 1453 Unknown, 0 Unchecked, 24.78ms Time], IncrementalHoareTripleChecker [102 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1890.09ms Time] [2021-11-13 18:18:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-13 18:18:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 382. [2021-11-13 18:18:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5706051873198847) internal successors, (545), 349 states have internal predecessors, (545), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 599 transitions. [2021-11-13 18:18:06,400 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 599 transitions. Word has length 178 [2021-11-13 18:18:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:06,400 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 599 transitions. [2021-11-13 18:18:06,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:06,401 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 599 transitions. [2021-11-13 18:18:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:06,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:06,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:06,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:18:06,410 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1714632965, now seen corresponding path program 1 times [2021-11-13 18:18:06,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:06,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94280548] [2021-11-13 18:18:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:06,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:06,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:06,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:06,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:06,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:06,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:06,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94280548] [2021-11-13 18:18:06,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94280548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:06,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:06,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:06,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769483124] [2021-11-13 18:18:06,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:06,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:06,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:06,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:06,618 INFO L87 Difference]: Start difference. First operand 382 states and 599 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:09,068 INFO L93 Difference]: Finished difference Result 908 states and 1455 transitions. [2021-11-13 18:18:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:09,073 INFO L225 Difference]: With dead ends: 908 [2021-11-13 18:18:09,073 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 18:18:09,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:09,076 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1205 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1782.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.49ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2064.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:09,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 1557 Invalid, 1492 Unknown, 0 Unchecked, 32.49ms Time], IncrementalHoareTripleChecker [76 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2064.05ms Time] [2021-11-13 18:18:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 18:18:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 382. [2021-11-13 18:18:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5677233429394812) internal successors, (544), 349 states have internal predecessors, (544), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 598 transitions. [2021-11-13 18:18:09,120 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 598 transitions. Word has length 178 [2021-11-13 18:18:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:09,120 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 598 transitions. [2021-11-13 18:18:09,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 598 transitions. [2021-11-13 18:18:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:09,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:09,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:18:09,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1103363907, now seen corresponding path program 1 times [2021-11-13 18:18:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:09,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533582110] [2021-11-13 18:18:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:09,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:09,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:09,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:09,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:09,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:09,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:09,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533582110] [2021-11-13 18:18:09,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533582110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:09,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:09,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:09,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037989261] [2021-11-13 18:18:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:09,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:09,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:09,310 INFO L87 Difference]: Start difference. First operand 382 states and 598 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:11,619 INFO L93 Difference]: Finished difference Result 906 states and 1449 transitions. [2021-11-13 18:18:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:11,627 INFO L225 Difference]: With dead ends: 906 [2021-11-13 18:18:11,627 INFO L226 Difference]: Without dead ends: 544 [2021-11-13 18:18:11,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:11,631 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 1109 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1697.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.62ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1966.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:11,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 1602 Invalid, 1577 Unknown, 0 Unchecked, 19.62ms Time], IncrementalHoareTripleChecker [77 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1966.74ms Time] [2021-11-13 18:18:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-13 18:18:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 382. [2021-11-13 18:18:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5648414985590777) internal successors, (543), 349 states have internal predecessors, (543), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 597 transitions. [2021-11-13 18:18:11,689 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 597 transitions. Word has length 178 [2021-11-13 18:18:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:11,690 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 597 transitions. [2021-11-13 18:18:11,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 597 transitions. [2021-11-13 18:18:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:11,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:11,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:11,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:18:11,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -301827771, now seen corresponding path program 1 times [2021-11-13 18:18:11,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:11,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754620929] [2021-11-13 18:18:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:11,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:11,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:11,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:11,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:11,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:11,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:11,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754620929] [2021-11-13 18:18:11,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754620929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:11,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:11,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:11,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363600956] [2021-11-13 18:18:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:11,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:11,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:11,977 INFO L87 Difference]: Start difference. First operand 382 states and 597 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:14,036 INFO L93 Difference]: Finished difference Result 904 states and 1443 transitions. [2021-11-13 18:18:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:14,042 INFO L225 Difference]: With dead ends: 904 [2021-11-13 18:18:14,043 INFO L226 Difference]: Without dead ends: 542 [2021-11-13 18:18:14,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:14,046 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 1274 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1426.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.38ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1693.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:14,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 1398 Invalid, 1418 Unknown, 0 Unchecked, 17.38ms Time], IncrementalHoareTripleChecker [106 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 1693.76ms Time] [2021-11-13 18:18:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-13 18:18:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 382. [2021-11-13 18:18:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5619596541786744) internal successors, (542), 349 states have internal predecessors, (542), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 596 transitions. [2021-11-13 18:18:14,100 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 596 transitions. Word has length 178 [2021-11-13 18:18:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:14,101 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 596 transitions. [2021-11-13 18:18:14,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 596 transitions. [2021-11-13 18:18:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:14,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:14,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:14,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:18:14,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1144753095, now seen corresponding path program 1 times [2021-11-13 18:18:14,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:14,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141084694] [2021-11-13 18:18:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:14,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:14,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:14,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:14,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:14,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:14,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:14,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:14,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141084694] [2021-11-13 18:18:14,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141084694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:14,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:14,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:14,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783829190] [2021-11-13 18:18:14,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:14,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:14,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:14,323 INFO L87 Difference]: Start difference. First operand 382 states and 596 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:16,226 INFO L93 Difference]: Finished difference Result 903 states and 1438 transitions. [2021-11-13 18:18:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:16,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:16,232 INFO L225 Difference]: With dead ends: 903 [2021-11-13 18:18:16,232 INFO L226 Difference]: Without dead ends: 541 [2021-11-13 18:18:16,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:16,235 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 1272 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1336.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.69ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1580.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:16,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1292 Valid, 1394 Invalid, 1408 Unknown, 0 Unchecked, 16.69ms Time], IncrementalHoareTripleChecker [106 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1580.64ms Time] [2021-11-13 18:18:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-13 18:18:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 382. [2021-11-13 18:18:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.559077809798271) internal successors, (541), 349 states have internal predecessors, (541), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 595 transitions. [2021-11-13 18:18:16,286 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 595 transitions. Word has length 178 [2021-11-13 18:18:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:16,289 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 595 transitions. [2021-11-13 18:18:16,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 595 transitions. [2021-11-13 18:18:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:16,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:16,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:16,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:18:16,294 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash 221585669, now seen corresponding path program 1 times [2021-11-13 18:18:16,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:16,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870225302] [2021-11-13 18:18:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:16,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:16,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:16,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:16,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:16,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:16,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:16,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870225302] [2021-11-13 18:18:16,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870225302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:16,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:16,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:16,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150617095] [2021-11-13 18:18:16,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:16,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:16,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:16,529 INFO L87 Difference]: Start difference. First operand 382 states and 595 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:18,433 INFO L93 Difference]: Finished difference Result 902 states and 1433 transitions. [2021-11-13 18:18:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:18,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:18,440 INFO L225 Difference]: With dead ends: 902 [2021-11-13 18:18:18,440 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 18:18:18,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:18,443 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1270 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1320.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.72ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1563.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:18,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 1390 Invalid, 1398 Unknown, 0 Unchecked, 16.72ms Time], IncrementalHoareTripleChecker [106 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 1563.77ms Time] [2021-11-13 18:18:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 18:18:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 382. [2021-11-13 18:18:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5561959654178674) internal successors, (540), 349 states have internal predecessors, (540), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 594 transitions. [2021-11-13 18:18:18,499 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 594 transitions. Word has length 178 [2021-11-13 18:18:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 594 transitions. [2021-11-13 18:18:18,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 594 transitions. [2021-11-13 18:18:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:18,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:18,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:18,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:18:18,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash 607448071, now seen corresponding path program 1 times [2021-11-13 18:18:18,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:18,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243972546] [2021-11-13 18:18:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:18,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:18,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:18,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:18,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:18,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243972546] [2021-11-13 18:18:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243972546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:18,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:18,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:18,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88125063] [2021-11-13 18:18:18,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:18,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:18,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:18,758 INFO L87 Difference]: Start difference. First operand 382 states and 594 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:20,967 INFO L93 Difference]: Finished difference Result 901 states and 1428 transitions. [2021-11-13 18:18:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:20,973 INFO L225 Difference]: With dead ends: 901 [2021-11-13 18:18:20,973 INFO L226 Difference]: Without dead ends: 539 [2021-11-13 18:18:20,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:20,976 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 1102 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1602.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.39ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1874.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:20,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1584 Invalid, 1524 Unknown, 0 Unchecked, 19.39ms Time], IncrementalHoareTripleChecker [78 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 1874.45ms Time] [2021-11-13 18:18:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-13 18:18:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 382. [2021-11-13 18:18:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.553314121037464) internal successors, (539), 349 states have internal predecessors, (539), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 593 transitions. [2021-11-13 18:18:21,027 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 593 transitions. Word has length 178 [2021-11-13 18:18:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:21,027 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 593 transitions. [2021-11-13 18:18:21,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 593 transitions. [2021-11-13 18:18:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:21,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:21,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:21,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:18:21,031 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 342800581, now seen corresponding path program 1 times [2021-11-13 18:18:21,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:21,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500278447] [2021-11-13 18:18:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:21,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:21,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:21,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:21,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:21,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:21,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:21,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500278447] [2021-11-13 18:18:21,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500278447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:21,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:21,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:21,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575089963] [2021-11-13 18:18:21,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:21,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:21,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:21,193 INFO L87 Difference]: Start difference. First operand 382 states and 593 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:23,076 INFO L93 Difference]: Finished difference Result 900 states and 1423 transitions. [2021-11-13 18:18:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:23,080 INFO L225 Difference]: With dead ends: 900 [2021-11-13 18:18:23,080 INFO L226 Difference]: Without dead ends: 538 [2021-11-13 18:18:23,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:23,082 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 1266 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1342.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.55ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1550.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:23,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 1382 Invalid, 1378 Unknown, 0 Unchecked, 19.55ms Time], IncrementalHoareTripleChecker [106 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 1550.93ms Time] [2021-11-13 18:18:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-13 18:18:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 382. [2021-11-13 18:18:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5504322766570606) internal successors, (538), 349 states have internal predecessors, (538), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 592 transitions. [2021-11-13 18:18:23,136 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 592 transitions. Word has length 178 [2021-11-13 18:18:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:23,136 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 592 transitions. [2021-11-13 18:18:23,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 592 transitions. [2021-11-13 18:18:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:23,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:23,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:23,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:18:23,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:23,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2021041081, now seen corresponding path program 1 times [2021-11-13 18:18:23,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:23,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573316689] [2021-11-13 18:18:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:23,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:23,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:23,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:23,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:23,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:23,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573316689] [2021-11-13 18:18:23,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573316689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:23,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:23,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:23,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337656786] [2021-11-13 18:18:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:23,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:23,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:23,362 INFO L87 Difference]: Start difference. First operand 382 states and 592 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:25,458 INFO L93 Difference]: Finished difference Result 899 states and 1418 transitions. [2021-11-13 18:18:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:25,462 INFO L225 Difference]: With dead ends: 899 [2021-11-13 18:18:25,463 INFO L226 Difference]: Without dead ends: 537 [2021-11-13 18:18:25,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:25,465 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1160 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1539.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.76ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1764.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:25,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 1541 Invalid, 1434 Unknown, 0 Unchecked, 18.76ms Time], IncrementalHoareTripleChecker [80 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 1764.49ms Time] [2021-11-13 18:18:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-13 18:18:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 382. [2021-11-13 18:18:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5475504322766571) internal successors, (537), 349 states have internal predecessors, (537), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 591 transitions. [2021-11-13 18:18:25,518 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 591 transitions. Word has length 178 [2021-11-13 18:18:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:25,519 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 591 transitions. [2021-11-13 18:18:25,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 591 transitions. [2021-11-13 18:18:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:25,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:25,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:25,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:18:25,523 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash 950747269, now seen corresponding path program 1 times [2021-11-13 18:18:25,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:25,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392525354] [2021-11-13 18:18:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:25,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:25,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:25,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:25,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:25,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:25,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:25,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392525354] [2021-11-13 18:18:25,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392525354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:25,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:25,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:25,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53240536] [2021-11-13 18:18:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:25,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:25,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:25,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:25,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:25,720 INFO L87 Difference]: Start difference. First operand 382 states and 591 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:27,181 INFO L93 Difference]: Finished difference Result 882 states and 1384 transitions. [2021-11-13 18:18:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:18:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:27,185 INFO L225 Difference]: With dead ends: 882 [2021-11-13 18:18:27,185 INFO L226 Difference]: Without dead ends: 520 [2021-11-13 18:18:27,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:18:27,188 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1265 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1015.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.66ms SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1203.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:27,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1285 Valid, 1339 Invalid, 1285 Unknown, 0 Unchecked, 11.66ms Time], IncrementalHoareTripleChecker [108 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1203.48ms Time] [2021-11-13 18:18:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-13 18:18:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 382. [2021-11-13 18:18:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5389048991354466) internal successors, (534), 349 states have internal predecessors, (534), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 588 transitions. [2021-11-13 18:18:27,253 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 588 transitions. Word has length 178 [2021-11-13 18:18:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:27,254 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 588 transitions. [2021-11-13 18:18:27,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 588 transitions. [2021-11-13 18:18:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:27,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:27,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:27,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:18:27,259 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2003721225, now seen corresponding path program 1 times [2021-11-13 18:18:27,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:27,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242957803] [2021-11-13 18:18:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:27,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:27,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:27,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:27,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:27,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:27,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242957803] [2021-11-13 18:18:27,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242957803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:27,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:27,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:27,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963875522] [2021-11-13 18:18:27,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:27,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:27,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:27,417 INFO L87 Difference]: Start difference. First operand 382 states and 588 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:29,105 INFO L93 Difference]: Finished difference Result 896 states and 1401 transitions. [2021-11-13 18:18:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:29,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:29,110 INFO L225 Difference]: With dead ends: 896 [2021-11-13 18:18:29,110 INFO L226 Difference]: Without dead ends: 534 [2021-11-13 18:18:29,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:29,113 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 1255 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1129.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.16ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1356.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:29,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1359 Invalid, 1343 Unknown, 0 Unchecked, 13.16ms Time], IncrementalHoareTripleChecker [111 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 1356.39ms Time] [2021-11-13 18:18:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-13 18:18:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 382. [2021-11-13 18:18:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5360230547550433) internal successors, (533), 349 states have internal predecessors, (533), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 587 transitions. [2021-11-13 18:18:29,170 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 587 transitions. Word has length 178 [2021-11-13 18:18:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:29,170 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 587 transitions. [2021-11-13 18:18:29,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 587 transitions. [2021-11-13 18:18:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:29,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:29,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:29,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:18:29,173 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:29,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1864691573, now seen corresponding path program 1 times [2021-11-13 18:18:29,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:29,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075447837] [2021-11-13 18:18:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:29,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:29,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:29,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:29,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:29,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:29,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:29,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075447837] [2021-11-13 18:18:29,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075447837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:29,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:29,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:29,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468470395] [2021-11-13 18:18:29,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:29,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:29,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:29,393 INFO L87 Difference]: Start difference. First operand 382 states and 587 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:30,845 INFO L93 Difference]: Finished difference Result 895 states and 1396 transitions. [2021-11-13 18:18:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:30,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:30,848 INFO L225 Difference]: With dead ends: 895 [2021-11-13 18:18:30,848 INFO L226 Difference]: Without dead ends: 533 [2021-11-13 18:18:30,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:30,850 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1253 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1011.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.84ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1185.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:30,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 1355 Invalid, 1333 Unknown, 0 Unchecked, 10.84ms Time], IncrementalHoareTripleChecker [111 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1185.91ms Time] [2021-11-13 18:18:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-13 18:18:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 382. [2021-11-13 18:18:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5331412103746398) internal successors, (532), 349 states have internal predecessors, (532), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 586 transitions. [2021-11-13 18:18:30,908 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 586 transitions. Word has length 178 [2021-11-13 18:18:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:30,908 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 586 transitions. [2021-11-13 18:18:30,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 586 transitions. [2021-11-13 18:18:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:30,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:30,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:30,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:18:30,911 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1889846217, now seen corresponding path program 1 times [2021-11-13 18:18:30,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:30,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564000306] [2021-11-13 18:18:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:30,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:30,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:31,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:31,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:31,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:31,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564000306] [2021-11-13 18:18:31,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564000306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:31,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:31,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:31,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303277803] [2021-11-13 18:18:31,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:31,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:31,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:31,089 INFO L87 Difference]: Start difference. First operand 382 states and 586 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:32,648 INFO L93 Difference]: Finished difference Result 894 states and 1391 transitions. [2021-11-13 18:18:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:32,653 INFO L225 Difference]: With dead ends: 894 [2021-11-13 18:18:32,653 INFO L226 Difference]: Without dead ends: 532 [2021-11-13 18:18:32,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:32,656 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 1251 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1077.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.37ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1266.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:32,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 1351 Invalid, 1323 Unknown, 0 Unchecked, 12.37ms Time], IncrementalHoareTripleChecker [111 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1266.61ms Time] [2021-11-13 18:18:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-13 18:18:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 382. [2021-11-13 18:18:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 347 states have (on average 1.5302593659942363) internal successors, (531), 349 states have internal predecessors, (531), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:18:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 585 transitions. [2021-11-13 18:18:32,733 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 585 transitions. Word has length 178 [2021-11-13 18:18:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:32,734 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 585 transitions. [2021-11-13 18:18:32,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 585 transitions. [2021-11-13 18:18:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:32,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:32,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:32,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:18:32,738 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1733865675, now seen corresponding path program 1 times [2021-11-13 18:18:32,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:32,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186138134] [2021-11-13 18:18:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:32,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:32,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:32,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:32,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:32,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186138134] [2021-11-13 18:18:32,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186138134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:32,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:32,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:18:32,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890447024] [2021-11-13 18:18:32,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:18:32,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:18:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:18:32,979 INFO L87 Difference]: Start difference. First operand 382 states and 585 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:37,269 INFO L93 Difference]: Finished difference Result 1540 states and 2398 transitions. [2021-11-13 18:18:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:18:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:37,281 INFO L225 Difference]: With dead ends: 1540 [2021-11-13 18:18:37,281 INFO L226 Difference]: Without dead ends: 1178 [2021-11-13 18:18:37,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:18:37,284 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 1994 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 2845 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2843.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 3576 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.18ms SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3298.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:37,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 3576 Invalid, 2946 Unknown, 0 Unchecked, 39.18ms Time], IncrementalHoareTripleChecker [101 Valid, 2845 Invalid, 0 Unknown, 0 Unchecked, 3298.16ms Time] [2021-11-13 18:18:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-11-13 18:18:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 746. [2021-11-13 18:18:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 683 states have (on average 1.534407027818448) internal successors, (1048), 686 states have internal predecessors, (1048), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 48 states have call predecessors, (50), 47 states have call successors, (50) [2021-11-13 18:18:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1147 transitions. [2021-11-13 18:18:37,430 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1147 transitions. Word has length 178 [2021-11-13 18:18:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:37,430 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1147 transitions. [2021-11-13 18:18:37,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1147 transitions. [2021-11-13 18:18:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:37,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:37,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:37,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:18:37,435 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2144476041, now seen corresponding path program 1 times [2021-11-13 18:18:37,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:37,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083166321] [2021-11-13 18:18:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:37,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:37,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:37,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:37,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:37,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:37,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:37,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:37,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083166321] [2021-11-13 18:18:37,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083166321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:37,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:37,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:37,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137623840] [2021-11-13 18:18:37,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:37,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:37,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:37,638 INFO L87 Difference]: Start difference. First operand 746 states and 1147 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:39,420 INFO L93 Difference]: Finished difference Result 1778 states and 2768 transitions. [2021-11-13 18:18:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:39,433 INFO L225 Difference]: With dead ends: 1778 [2021-11-13 18:18:39,433 INFO L226 Difference]: Without dead ends: 1052 [2021-11-13 18:18:39,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:39,437 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 1250 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1155.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.66ms SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1370.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:39,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1270 Valid, 1343 Invalid, 1309 Unknown, 0 Unchecked, 14.66ms Time], IncrementalHoareTripleChecker [114 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1370.92ms Time] [2021-11-13 18:18:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-13 18:18:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 746. [2021-11-13 18:18:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 683 states have (on average 1.5314787701317716) internal successors, (1046), 686 states have internal predecessors, (1046), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 48 states have call predecessors, (50), 47 states have call successors, (50) [2021-11-13 18:18:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1145 transitions. [2021-11-13 18:18:39,575 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1145 transitions. Word has length 178 [2021-11-13 18:18:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:39,576 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1145 transitions. [2021-11-13 18:18:39,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1145 transitions. [2021-11-13 18:18:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:39,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:39,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:39,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:18:39,580 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash 356606219, now seen corresponding path program 1 times [2021-11-13 18:18:39,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:39,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818197181] [2021-11-13 18:18:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:39,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:39,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:39,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818197181] [2021-11-13 18:18:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818197181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:39,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:39,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:39,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119185326] [2021-11-13 18:18:39,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:39,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:39,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:39,777 INFO L87 Difference]: Start difference. First operand 746 states and 1145 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:41,707 INFO L93 Difference]: Finished difference Result 1775 states and 2756 transitions. [2021-11-13 18:18:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:41,712 INFO L225 Difference]: With dead ends: 1775 [2021-11-13 18:18:41,712 INFO L226 Difference]: Without dead ends: 1049 [2021-11-13 18:18:41,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:41,720 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1112 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1324.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.78ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1518.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:41,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 1518 Invalid, 1380 Unknown, 0 Unchecked, 15.78ms Time], IncrementalHoareTripleChecker [88 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 1518.12ms Time] [2021-11-13 18:18:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-11-13 18:18:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 746. [2021-11-13 18:18:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 683 states have (on average 1.528550512445095) internal successors, (1044), 686 states have internal predecessors, (1044), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 48 states have call predecessors, (50), 47 states have call successors, (50) [2021-11-13 18:18:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1143 transitions. [2021-11-13 18:18:41,883 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1143 transitions. Word has length 178 [2021-11-13 18:18:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:41,884 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1143 transitions. [2021-11-13 18:18:41,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1143 transitions. [2021-11-13 18:18:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:41,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:41,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:41,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:18:41,888 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1779276983, now seen corresponding path program 1 times [2021-11-13 18:18:41,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:41,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520037694] [2021-11-13 18:18:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:41,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:41,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:41,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:42,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:42,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:42,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:42,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520037694] [2021-11-13 18:18:42,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520037694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:42,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:42,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:18:42,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613193829] [2021-11-13 18:18:42,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:42,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:18:42,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:42,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:18:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:18:42,106 INFO L87 Difference]: Start difference. First operand 746 states and 1143 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:45,879 INFO L93 Difference]: Finished difference Result 2980 states and 4637 transitions. [2021-11-13 18:18:45,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:18:45,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:45,891 INFO L225 Difference]: With dead ends: 2980 [2021-11-13 18:18:45,891 INFO L226 Difference]: Without dead ends: 2254 [2021-11-13 18:18:45,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:18:45,895 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 1982 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2358.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2001 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.18ms SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2753.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:45,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2001 Valid, 3289 Invalid, 3025 Unknown, 0 Unchecked, 29.18ms Time], IncrementalHoareTripleChecker [131 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 2753.96ms Time] [2021-11-13 18:18:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-11-13 18:18:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1484. [2021-11-13 18:18:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1364 states have (on average 1.532991202346041) internal successors, (2091), 1371 states have internal predecessors, (2091), 90 states have call successors, (90), 25 states have call predecessors, (90), 29 states have return successors, (103), 91 states have call predecessors, (103), 88 states have call successors, (103) [2021-11-13 18:18:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2284 transitions. [2021-11-13 18:18:46,181 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2284 transitions. Word has length 178 [2021-11-13 18:18:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:46,181 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2284 transitions. [2021-11-13 18:18:46,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2284 transitions. [2021-11-13 18:18:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:46,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:46,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:46,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 18:18:46,185 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1709629109, now seen corresponding path program 1 times [2021-11-13 18:18:46,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:46,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634445860] [2021-11-13 18:18:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:46,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:46,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:46,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:46,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:46,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:46,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:46,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:46,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634445860] [2021-11-13 18:18:46,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634445860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:46,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:46,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:18:46,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433694832] [2021-11-13 18:18:46,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:46,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:18:46,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:18:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:18:46,385 INFO L87 Difference]: Start difference. First operand 1484 states and 2284 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:50,445 INFO L93 Difference]: Finished difference Result 5864 states and 9162 transitions. [2021-11-13 18:18:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:18:50,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:50,476 INFO L225 Difference]: With dead ends: 5864 [2021-11-13 18:18:50,477 INFO L226 Difference]: Without dead ends: 4400 [2021-11-13 18:18:50,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:18:50,483 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 1955 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2800 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2291.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.28ms SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2691.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:50,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 3249 Invalid, 2931 Unknown, 0 Unchecked, 28.28ms Time], IncrementalHoareTripleChecker [131 Valid, 2800 Invalid, 0 Unknown, 0 Unchecked, 2691.07ms Time] [2021-11-13 18:18:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-11-13 18:18:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2984. [2021-11-13 18:18:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2746 states have (on average 1.5371449380917699) internal successors, (4221), 2767 states have internal predecessors, (4221), 170 states have call successors, (170), 49 states have call predecessors, (170), 67 states have return successors, (231), 175 states have call predecessors, (231), 168 states have call successors, (231) [2021-11-13 18:18:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 4622 transitions. [2021-11-13 18:18:51,001 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 4622 transitions. Word has length 178 [2021-11-13 18:18:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:51,002 INFO L470 AbstractCegarLoop]: Abstraction has 2984 states and 4622 transitions. [2021-11-13 18:18:51,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 4622 transitions. [2021-11-13 18:18:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:51,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:51,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:51,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 18:18:51,007 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash -310675507, now seen corresponding path program 1 times [2021-11-13 18:18:51,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:51,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836360539] [2021-11-13 18:18:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:51,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:51,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:51,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836360539] [2021-11-13 18:18:51,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836360539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:51,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:51,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:18:51,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061756542] [2021-11-13 18:18:51,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:51,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:18:51,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:51,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:18:51,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:18:51,176 INFO L87 Difference]: Start difference. First operand 2984 states and 4622 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:53,330 INFO L93 Difference]: Finished difference Result 7187 states and 11228 transitions. [2021-11-13 18:18:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:53,354 INFO L225 Difference]: With dead ends: 7187 [2021-11-13 18:18:53,355 INFO L226 Difference]: Without dead ends: 4223 [2021-11-13 18:18:53,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:18:53,364 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 1249 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1107.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.02ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1296.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:53,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 1325 Invalid, 1275 Unknown, 0 Unchecked, 12.02ms Time], IncrementalHoareTripleChecker [117 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 1296.63ms Time] [2021-11-13 18:18:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2021-11-13 18:18:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 2984. [2021-11-13 18:18:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2746 states have (on average 1.534231609613984) internal successors, (4213), 2767 states have internal predecessors, (4213), 170 states have call successors, (170), 49 states have call predecessors, (170), 67 states have return successors, (231), 175 states have call predecessors, (231), 168 states have call successors, (231) [2021-11-13 18:18:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 4614 transitions. [2021-11-13 18:18:53,917 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 4614 transitions. Word has length 178 [2021-11-13 18:18:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:53,917 INFO L470 AbstractCegarLoop]: Abstraction has 2984 states and 4614 transitions. [2021-11-13 18:18:53,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:53,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 4614 transitions. [2021-11-13 18:18:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:53,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:53,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:53,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 18:18:53,923 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:53,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1928115957, now seen corresponding path program 1 times [2021-11-13 18:18:53,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:53,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841992836] [2021-11-13 18:18:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:53,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:53,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:54,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:54,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:54,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:54,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:54,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841992836] [2021-11-13 18:18:54,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841992836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:54,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:54,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:18:54,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717370302] [2021-11-13 18:18:54,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:54,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:18:54,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:18:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:18:54,146 INFO L87 Difference]: Start difference. First operand 2984 states and 4614 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:58,493 INFO L93 Difference]: Finished difference Result 11578 states and 18170 transitions. [2021-11-13 18:18:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:18:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:18:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:58,537 INFO L225 Difference]: With dead ends: 11578 [2021-11-13 18:18:58,537 INFO L226 Difference]: Without dead ends: 8614 [2021-11-13 18:18:58,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:18:58,548 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 1925 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2698 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2117.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.85ms SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2468.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:58,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1944 Valid, 3207 Invalid, 2829 Unknown, 0 Unchecked, 25.85ms Time], IncrementalHoareTripleChecker [131 Valid, 2698 Invalid, 0 Unknown, 0 Unchecked, 2468.46ms Time] [2021-11-13 18:18:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8614 states. [2021-11-13 18:18:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8614 to 6026. [2021-11-13 18:18:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6026 states, 5538 states have (on average 1.5361141206211628) internal successors, (8507), 5605 states have internal predecessors, (8507), 326 states have call successors, (326), 97 states have call predecessors, (326), 161 states have return successors, (579), 339 states have call predecessors, (579), 324 states have call successors, (579) [2021-11-13 18:18:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 9412 transitions. [2021-11-13 18:18:59,499 INFO L78 Accepts]: Start accepts. Automaton has 6026 states and 9412 transitions. Word has length 178 [2021-11-13 18:18:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:59,500 INFO L470 AbstractCegarLoop]: Abstraction has 6026 states and 9412 transitions. [2021-11-13 18:18:59,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:18:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6026 states and 9412 transitions. [2021-11-13 18:18:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:18:59,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:59,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:59,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 18:18:59,504 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1564649459, now seen corresponding path program 1 times [2021-11-13 18:18:59,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:59,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575788051] [2021-11-13 18:18:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:59,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:18:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:59,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:18:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:59,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:18:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:18:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:18:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:59,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:59,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575788051] [2021-11-13 18:18:59,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575788051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:59,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:59,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:18:59,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575303432] [2021-11-13 18:18:59,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:59,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:18:59,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:18:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:18:59,673 INFO L87 Difference]: Start difference. First operand 6026 states and 9412 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:05,186 INFO L93 Difference]: Finished difference Result 23159 states and 36784 transitions. [2021-11-13 18:19:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:19:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:19:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:05,286 INFO L225 Difference]: With dead ends: 23159 [2021-11-13 18:19:05,287 INFO L226 Difference]: Without dead ends: 17153 [2021-11-13 18:19:05,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:19:05,319 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 1971 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2007.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.73ms SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2390.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:05,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 3159 Invalid, 2579 Unknown, 0 Unchecked, 25.73ms Time], IncrementalHoareTripleChecker [135 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 2390.86ms Time] [2021-11-13 18:19:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17153 states. [2021-11-13 18:19:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17153 to 12221. [2021-11-13 18:19:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12221 states, 11187 states have (on average 1.5356217037632967) internal successors, (17179), 11400 states have internal predecessors, (17179), 630 states have call successors, (630), 193 states have call predecessors, (630), 403 states have return successors, (1651), 659 states have call predecessors, (1651), 628 states have call successors, (1651) [2021-11-13 18:19:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12221 states to 12221 states and 19460 transitions. [2021-11-13 18:19:07,153 INFO L78 Accepts]: Start accepts. Automaton has 12221 states and 19460 transitions. Word has length 178 [2021-11-13 18:19:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:07,154 INFO L470 AbstractCegarLoop]: Abstraction has 12221 states and 19460 transitions. [2021-11-13 18:19:07,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 6 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 12221 states and 19460 transitions. [2021-11-13 18:19:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:19:07,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:07,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:07,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-13 18:19:07,163 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1275830069, now seen corresponding path program 1 times [2021-11-13 18:19:07,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:07,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902272819] [2021-11-13 18:19:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:07,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:19:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:07,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:19:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:07,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:19:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:07,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:19:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:07,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:19:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:07,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:07,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902272819] [2021-11-13 18:19:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902272819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:07,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:07,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:19:07,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151987142] [2021-11-13 18:19:07,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:07,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:19:07,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:19:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:19:07,309 INFO L87 Difference]: Start difference. First operand 12221 states and 19460 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:11,705 INFO L93 Difference]: Finished difference Result 29324 states and 47102 transitions. [2021-11-13 18:19:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:19:11,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:19:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:11,784 INFO L225 Difference]: With dead ends: 29324 [2021-11-13 18:19:11,784 INFO L226 Difference]: Without dead ends: 17123 [2021-11-13 18:19:11,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:19:11,829 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 1083 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1274.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.04ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1477.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:11,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 1514 Invalid, 1351 Unknown, 0 Unchecked, 16.04ms Time], IncrementalHoareTripleChecker [87 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1477.20ms Time] [2021-11-13 18:19:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17123 states. [2021-11-13 18:19:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17123 to 12221. [2021-11-13 18:19:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12221 states, 11187 states have (on average 1.5327612407258424) internal successors, (17147), 11400 states have internal predecessors, (17147), 630 states have call successors, (630), 193 states have call predecessors, (630), 403 states have return successors, (1651), 659 states have call predecessors, (1651), 628 states have call successors, (1651) [2021-11-13 18:19:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12221 states to 12221 states and 19428 transitions. [2021-11-13 18:19:13,951 INFO L78 Accepts]: Start accepts. Automaton has 12221 states and 19428 transitions. Word has length 178 [2021-11-13 18:19:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:13,952 INFO L470 AbstractCegarLoop]: Abstraction has 12221 states and 19428 transitions. [2021-11-13 18:19:13,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 12221 states and 19428 transitions. [2021-11-13 18:19:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 18:19:13,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:13,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:13,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 18:19:13,962 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1820702643, now seen corresponding path program 1 times [2021-11-13 18:19:13,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:13,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241780073] [2021-11-13 18:19:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:13,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:13,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:19:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:19:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:14,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:19:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:19:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:19:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:14,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:14,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241780073] [2021-11-13 18:19:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241780073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:14,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:14,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:19:14,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297831342] [2021-11-13 18:19:14,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:14,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:19:14,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:14,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:19:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:19:14,129 INFO L87 Difference]: Start difference. First operand 12221 states and 19428 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:23,185 INFO L93 Difference]: Finished difference Result 45224 states and 71894 transitions. [2021-11-13 18:19:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:19:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-11-13 18:19:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:23,333 INFO L225 Difference]: With dead ends: 45224 [2021-11-13 18:19:23,334 INFO L226 Difference]: Without dead ends: 33024 [2021-11-13 18:19:23,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:19:23,380 INFO L933 BasicCegarLoop]: 1176 mSDtfsCounter, 1918 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2563.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.60ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2936.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:23,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1962 Valid, 2447 Invalid, 2375 Unknown, 0 Unchecked, 31.60ms Time], IncrementalHoareTripleChecker [129 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 2936.86ms Time] [2021-11-13 18:19:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33024 states. [2021-11-13 18:19:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33024 to 24160. [2021-11-13 18:19:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24160 states, 22099 states have (on average 1.5258608986831983) internal successors, (33720), 22555 states have internal predecessors, (33720), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 806 states have return successors, (3267), 1251 states have call predecessors, (3267), 1252 states have call successors, (3267) [2021-11-13 18:19:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24160 states to 24160 states and 38241 transitions. [2021-11-13 18:19:27,196 INFO L78 Accepts]: Start accepts. Automaton has 24160 states and 38241 transitions. Word has length 178 [2021-11-13 18:19:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:27,196 INFO L470 AbstractCegarLoop]: Abstraction has 24160 states and 38241 transitions. [2021-11-13 18:19:27,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 24160 states and 38241 transitions. [2021-11-13 18:19:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-13 18:19:27,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:27,262 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:19:27,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 18:19:27,263 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:27,263 INFO L85 PathProgramCache]: Analyzing trace with hash -299686626, now seen corresponding path program 1 times [2021-11-13 18:19:27,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:27,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685911577] [2021-11-13 18:19:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:27,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:19:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:19:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:19:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:19:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:19:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-13 18:19:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:19:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2021-11-13 18:19:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:19:27,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:27,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685911577] [2021-11-13 18:19:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685911577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:19:27,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674440586] [2021-11-13 18:19:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:27,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:27,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:19:27,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:19:27,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:19:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:19:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:19:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:19:28,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:19:28,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674440586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:28,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:19:28,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:19:28,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824862932] [2021-11-13 18:19:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:28,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:19:28,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:19:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:19:28,841 INFO L87 Difference]: Start difference. First operand 24160 states and 38241 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:19:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:35,242 INFO L93 Difference]: Finished difference Result 72213 states and 115133 transitions. [2021-11-13 18:19:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:19:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 290 [2021-11-13 18:19:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:35,383 INFO L225 Difference]: With dead ends: 72213 [2021-11-13 18:19:35,383 INFO L226 Difference]: Without dead ends: 48074 [2021-11-13 18:19:35,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:19:35,449 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 477 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:35,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 1135 Invalid, 12 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.43ms Time] [2021-11-13 18:19:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48074 states. [2021-11-13 18:19:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48074 to 47942. [2021-11-13 18:19:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47942 states, 43859 states have (on average 1.525296974395221) internal successors, (66898), 44769 states have internal predecessors, (66898), 2470 states have call successors, (2470), 769 states have call predecessors, (2470), 1612 states have return successors, (6467), 2435 states have call predecessors, (6467), 2468 states have call successors, (6467) [2021-11-13 18:19:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47942 states to 47942 states and 75835 transitions. [2021-11-13 18:19:43,152 INFO L78 Accepts]: Start accepts. Automaton has 47942 states and 75835 transitions. Word has length 290 [2021-11-13 18:19:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:43,153 INFO L470 AbstractCegarLoop]: Abstraction has 47942 states and 75835 transitions. [2021-11-13 18:19:43,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:19:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 47942 states and 75835 transitions. [2021-11-13 18:19:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-13 18:19:43,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:43,274 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:19:43,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:19:43,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 18:19:43,503 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2043402494, now seen corresponding path program 1 times [2021-11-13 18:19:43,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:43,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007524022] [2021-11-13 18:19:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:43,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:19:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:19:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:19:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:19:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:19:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-13 18:19:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:19:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2021-11-13 18:19:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:19:43,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:43,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007524022] [2021-11-13 18:19:43,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007524022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:19:43,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252858546] [2021-11-13 18:19:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:43,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:43,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:19:43,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:19:43,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1de39c-246b-4ce0-8da0-5404f6bdb501/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:19:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:19:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:19:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:19:44,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:19:44,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252858546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:44,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:19:44,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:19:44,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832802732] [2021-11-13 18:19:44,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:44,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:19:44,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:19:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:19:44,962 INFO L87 Difference]: Start difference. First operand 47942 states and 75835 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)