./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c4ba866c3a79d104a7473fc3c035156e2c10c247b66ad04eaab0b68446430314 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:27:52,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:27:52,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:27:52,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:27:52,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:27:52,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:27:52,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:27:52,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:27:52,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:27:52,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:27:52,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:27:52,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:27:52,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:27:52,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:27:52,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:27:52,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:27:52,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:27:52,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:27:52,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:27:52,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:27:52,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:27:52,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:27:52,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:27:52,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:27:52,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:27:52,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:27:52,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:27:52,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:27:52,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:27:52,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:27:52,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:27:52,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:27:52,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:27:52,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:27:52,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:27:52,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:27:52,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:27:52,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:27:52,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:27:52,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:27:52,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:27:52,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:27:52,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:27:52,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:27:52,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:27:52,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:27:52,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:27:52,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:27:52,343 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:27:52,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:27:52,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:27:52,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:27:52,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:27:52,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:27:52,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:27:52,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:27:52,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:27:52,345 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:27:52,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:27:52,346 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:27:52,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:27:52,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:27:52,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:27:52,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:27:52,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:27:52,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:27:52,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:27:52,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:27:52,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:27:52,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:27:52,347 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:27:52,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:27:52,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:27:52,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:27:52,348 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_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4ba866c3a79d104a7473fc3c035156e2c10c247b66ad04eaab0b68446430314 [2021-11-23 13:27:52,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:27:52,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:27:52,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:27:52,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:27:52,767 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:27:52,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c [2021-11-23 13:27:52,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/data/41caf6fc5/ab45daecf4cc49c7ad165067e575781a/FLAGeb525a5f6 [2021-11-23 13:27:53,930 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:27:53,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c [2021-11-23 13:27:54,009 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/data/41caf6fc5/ab45daecf4cc49c7ad165067e575781a/FLAGeb525a5f6 [2021-11-23 13:27:54,349 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/data/41caf6fc5/ab45daecf4cc49c7ad165067e575781a [2021-11-23 13:27:54,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:27:54,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:27:54,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:27:54,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:27:54,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:27:54,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:27:54" (1/1) ... [2021-11-23 13:27:54,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac25536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:54, skipping insertion in model container [2021-11-23 13:27:54,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:27:54" (1/1) ... [2021-11-23 13:27:54,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:27:54,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:27:55,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[11640,11653] [2021-11-23 13:27:55,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[13515,13528] [2021-11-23 13:27:56,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:27:56,421 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:27:56,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[11640,11653] [2021-11-23 13:27:56,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c[13515,13528] [2021-11-23 13:27:57,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:27:57,370 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:27:57,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57 WrapperNode [2021-11-23 13:27:57,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:27:57,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:27:57,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:27:57,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:27:57,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:57,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,021 INFO L137 Inliner]: procedures = 36, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5090 [2021-11-23 13:27:58,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:27:58,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:27:58,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:27:58,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:27:58,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:27:58,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:27:58,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:27:58,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:27:58,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (1/1) ... [2021-11-23 13:27:58,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:27:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:27:58,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:27:58,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:27:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:27:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:27:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:27:58,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:27:58,782 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:27:58,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:28:04,568 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:28:04,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:28:04,588 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 13:28:04,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:28:04 BoogieIcfgContainer [2021-11-23 13:28:04,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:28:04,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:28:04,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:28:04,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:28:04,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:27:54" (1/3) ... [2021-11-23 13:28:04,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed0ee6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:28:04, skipping insertion in model container [2021-11-23 13:28:04,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:27:57" (2/3) ... [2021-11-23 13:28:04,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed0ee6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:28:04, skipping insertion in model container [2021-11-23 13:28:04,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:28:04" (3/3) ... [2021-11-23 13:28:04,602 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label00.c [2021-11-23 13:28:04,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:28:04,609 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 13:28:04,674 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:28:04,683 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:28:04,683 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 13:28:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:28:04,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:04,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:04,738 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1807618123, now seen corresponding path program 1 times [2021-11-23 13:28:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667597345] [2021-11-23 13:28:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:04,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:05,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:05,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667597345] [2021-11-23 13:28:05,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667597345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:05,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:05,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:28:05,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864166909] [2021-11-23 13:28:05,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:05,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:05,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:05,076 INFO L87 Difference]: Start difference. First operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:10,397 INFO L93 Difference]: Finished difference Result 2536 states and 4876 transitions. [2021-11-23 13:28:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 13:28:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:10,438 INFO L225 Difference]: With dead ends: 2536 [2021-11-23 13:28:10,438 INFO L226 Difference]: Without dead ends: 1594 [2021-11-23 13:28:10,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:10,452 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 972 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 636 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 13:28:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-23 13:28:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-11-23 13:28:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.64321608040201) internal successors, (2616), 1593 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2616 transitions. [2021-11-23 13:28:10,592 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2616 transitions. Word has length 16 [2021-11-23 13:28:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2616 transitions. [2021-11-23 13:28:10,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2616 transitions. [2021-11-23 13:28:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 13:28:10,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:10,596 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] [2021-11-23 13:28:10,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:28:10,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2021-11-23 13:28:10,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:10,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445638546] [2021-11-23 13:28:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:10,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:10,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:10,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445638546] [2021-11-23 13:28:10,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445638546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:10,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:10,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:28:10,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572097866] [2021-11-23 13:28:10,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:10,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:28:10,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:28:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:28:10,683 INFO L87 Difference]: Start difference. First operand 1594 states and 2616 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:10,780 INFO L93 Difference]: Finished difference Result 1650 states and 2702 transitions. [2021-11-23 13:28:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:28:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 13:28:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:10,792 INFO L225 Difference]: With dead ends: 1650 [2021-11-23 13:28:10,793 INFO L226 Difference]: Without dead ends: 1594 [2021-11-23 13:28:10,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:10,800 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 3 mSDsluCounter, 4727 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6314 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:10,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6314 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-23 13:28:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-11-23 13:28:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.6237437185929648) internal successors, (2585), 1593 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2585 transitions. [2021-11-23 13:28:10,868 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2585 transitions. Word has length 34 [2021-11-23 13:28:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:10,869 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2585 transitions. [2021-11-23 13:28:10,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2585 transitions. [2021-11-23 13:28:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:28:10,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:10,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:10,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:28:10,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:10,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2021-11-23 13:28:10,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:10,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661591297] [2021-11-23 13:28:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:10,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:11,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:11,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661591297] [2021-11-23 13:28:11,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661591297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:11,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:11,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:28:11,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518757163] [2021-11-23 13:28:11,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:11,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:11,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:11,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:11,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,044 INFO L87 Difference]: Start difference. First operand 1594 states and 2585 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:11,092 INFO L93 Difference]: Finished difference Result 1692 states and 2739 transitions. [2021-11-23 13:28:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 13:28:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:11,105 INFO L225 Difference]: With dead ends: 1692 [2021-11-23 13:28:11,106 INFO L226 Difference]: Without dead ends: 1640 [2021-11-23 13:28:11,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,117 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 1511 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:11,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1706 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-23 13:28:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2021-11-23 13:28:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1636 states have (on average 1.6228606356968216) internal successors, (2655), 1637 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2655 transitions. [2021-11-23 13:28:11,237 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2655 transitions. Word has length 64 [2021-11-23 13:28:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:11,237 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2655 transitions. [2021-11-23 13:28:11,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2655 transitions. [2021-11-23 13:28:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:28:11,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:11,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:11,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:28:11,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2021-11-23 13:28:11,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:11,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949012671] [2021-11-23 13:28:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:11,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:11,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:11,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949012671] [2021-11-23 13:28:11,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949012671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:11,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:11,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:28:11,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787745996] [2021-11-23 13:28:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:11,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:11,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,364 INFO L87 Difference]: Start difference. First operand 1638 states and 2655 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:11,421 INFO L93 Difference]: Finished difference Result 1818 states and 2939 transitions. [2021-11-23 13:28:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:11,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 13:28:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:11,435 INFO L225 Difference]: With dead ends: 1818 [2021-11-23 13:28:11,435 INFO L226 Difference]: Without dead ends: 1722 [2021-11-23 13:28:11,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,438 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 1507 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:11,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1705 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-11-23 13:28:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2021-11-23 13:28:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1718 states have (on average 1.620488940628638) internal successors, (2784), 1719 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2784 transitions. [2021-11-23 13:28:11,507 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2784 transitions. Word has length 64 [2021-11-23 13:28:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:11,507 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 2784 transitions. [2021-11-23 13:28:11,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2784 transitions. [2021-11-23 13:28:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:28:11,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:11,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:11,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:28:11,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:11,511 INFO L85 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2021-11-23 13:28:11,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:11,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213186530] [2021-11-23 13:28:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:11,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:11,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:11,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213186530] [2021-11-23 13:28:11,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213186530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:11,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:11,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:28:11,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744586039] [2021-11-23 13:28:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:11,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:11,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,588 INFO L87 Difference]: Start difference. First operand 1720 states and 2784 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:11,649 INFO L93 Difference]: Finished difference Result 2052 states and 3306 transitions. [2021-11-23 13:28:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 13:28:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:11,664 INFO L225 Difference]: With dead ends: 2052 [2021-11-23 13:28:11,665 INFO L226 Difference]: Without dead ends: 1874 [2021-11-23 13:28:11,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,667 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 1503 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:11,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-23 13:28:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2021-11-23 13:28:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1870 states have (on average 1.6149732620320856) internal successors, (3020), 1871 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3020 transitions. [2021-11-23 13:28:11,742 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3020 transitions. Word has length 64 [2021-11-23 13:28:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:11,743 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 3020 transitions. [2021-11-23 13:28:11,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3020 transitions. [2021-11-23 13:28:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:28:11,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:11,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:11,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:28:11,745 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:11,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2021-11-23 13:28:11,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264570117] [2021-11-23 13:28:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:11,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:11,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:11,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264570117] [2021-11-23 13:28:11,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264570117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:11,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:11,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:28:11,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179892830] [2021-11-23 13:28:11,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:11,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:11,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:11,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:11,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,815 INFO L87 Difference]: Start difference. First operand 1872 states and 3020 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:11,895 INFO L93 Difference]: Finished difference Result 2484 states and 3974 transitions. [2021-11-23 13:28:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 13:28:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:11,914 INFO L225 Difference]: With dead ends: 2484 [2021-11-23 13:28:11,914 INFO L226 Difference]: Without dead ends: 2154 [2021-11-23 13:28:11,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:11,918 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 1499 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:11,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 1703 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-11-23 13:28:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2021-11-23 13:28:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2150 states have (on average 1.6037209302325581) internal successors, (3448), 2151 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3448 transitions. [2021-11-23 13:28:12,017 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3448 transitions. Word has length 64 [2021-11-23 13:28:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:12,017 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3448 transitions. [2021-11-23 13:28:12,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3448 transitions. [2021-11-23 13:28:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:28:12,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:12,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:12,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:28:12,020 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:12,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:12,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2021-11-23 13:28:12,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651525634] [2021-11-23 13:28:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:12,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:12,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651525634] [2021-11-23 13:28:12,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651525634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:12,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:12,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:28:12,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000575628] [2021-11-23 13:28:12,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:12,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:12,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:12,134 INFO L87 Difference]: Start difference. First operand 2152 states and 3448 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:12,230 INFO L93 Difference]: Finished difference Result 3276 states and 5178 transitions. [2021-11-23 13:28:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 13:28:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:12,250 INFO L225 Difference]: With dead ends: 3276 [2021-11-23 13:28:12,250 INFO L226 Difference]: Without dead ends: 2666 [2021-11-23 13:28:12,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:12,254 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 1495 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:12,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 1702 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-11-23 13:28:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2021-11-23 13:28:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2662 states have (on average 1.583771600300526) internal successors, (4216), 2663 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4216 transitions. [2021-11-23 13:28:12,379 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4216 transitions. Word has length 64 [2021-11-23 13:28:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:12,381 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 4216 transitions. [2021-11-23 13:28:12,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4216 transitions. [2021-11-23 13:28:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:28:12,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:12,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:12,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:28:12,384 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2021-11-23 13:28:12,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:12,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373348069] [2021-11-23 13:28:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:12,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:12,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:12,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373348069] [2021-11-23 13:28:12,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373348069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:12,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:12,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:28:12,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896464108] [2021-11-23 13:28:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:12,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:28:12,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:28:12,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:12,521 INFO L87 Difference]: Start difference. First operand 2664 states and 4216 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:13,261 INFO L93 Difference]: Finished difference Result 13884 states and 21346 transitions. [2021-11-23 13:28:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 13:28:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 13:28:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:13,354 INFO L225 Difference]: With dead ends: 13884 [2021-11-23 13:28:13,354 INFO L226 Difference]: Without dead ends: 12762 [2021-11-23 13:28:13,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:28:13,361 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 8512 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8512 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:13,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8512 Valid, 2392 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2021-11-23 13:28:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2021-11-23 13:28:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3782 states have (on average 1.550502379693284) internal successors, (5864), 3783 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5864 transitions. [2021-11-23 13:28:13,666 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5864 transitions. Word has length 64 [2021-11-23 13:28:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:13,666 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 5864 transitions. [2021-11-23 13:28:13,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5864 transitions. [2021-11-23 13:28:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:28:13,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:13,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:13,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:28:13,672 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2021-11-23 13:28:13,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558611655] [2021-11-23 13:28:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:13,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:13,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558611655] [2021-11-23 13:28:13,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558611655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:13,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:13,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:28:13,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972004744] [2021-11-23 13:28:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:13,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:13,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:13,738 INFO L87 Difference]: Start difference. First operand 3784 states and 5864 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:13,932 INFO L93 Difference]: Finished difference Result 7070 states and 10780 transitions. [2021-11-23 13:28:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:13,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 13:28:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:13,945 INFO L225 Difference]: With dead ends: 7070 [2021-11-23 13:28:13,945 INFO L226 Difference]: Without dead ends: 4828 [2021-11-23 13:28:13,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:13,952 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 1487 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:13,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 1665 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:13,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-11-23 13:28:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-11-23 13:28:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.5277777777777777) internal successors, (7370), 4825 states have internal predecessors, (7370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7370 transitions. [2021-11-23 13:28:14,213 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7370 transitions. Word has length 66 [2021-11-23 13:28:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:14,214 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7370 transitions. [2021-11-23 13:28:14,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7370 transitions. [2021-11-23 13:28:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:28:14,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:14,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:14,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:28:14,221 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2021-11-23 13:28:14,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:14,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863691517] [2021-11-23 13:28:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:14,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:14,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:14,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863691517] [2021-11-23 13:28:14,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863691517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:14,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:14,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:28:14,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497071152] [2021-11-23 13:28:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:14,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:28:14,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:28:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:14,472 INFO L87 Difference]: Start difference. First operand 4826 states and 7370 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:14,853 INFO L93 Difference]: Finished difference Result 8110 states and 12236 transitions. [2021-11-23 13:28:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:28:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 13:28:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:14,866 INFO L225 Difference]: With dead ends: 8110 [2021-11-23 13:28:14,866 INFO L226 Difference]: Without dead ends: 4828 [2021-11-23 13:28:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:28:14,873 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 6144 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:14,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6144 Valid, 1867 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-11-23 13:28:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-11-23 13:28:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.5178275290215588) internal successors, (7322), 4825 states have internal predecessors, (7322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7322 transitions. [2021-11-23 13:28:15,127 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7322 transitions. Word has length 66 [2021-11-23 13:28:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:15,127 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7322 transitions. [2021-11-23 13:28:15,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7322 transitions. [2021-11-23 13:28:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:28:15,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:15,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:15,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:28:15,189 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:15,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2021-11-23 13:28:15,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:15,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296348479] [2021-11-23 13:28:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:15,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:15,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296348479] [2021-11-23 13:28:15,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296348479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:15,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:15,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:28:15,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185415065] [2021-11-23 13:28:15,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:15,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:28:15,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:28:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:28:15,302 INFO L87 Difference]: Start difference. First operand 4826 states and 7322 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:15,625 INFO L93 Difference]: Finished difference Result 8108 states and 12139 transitions. [2021-11-23 13:28:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:28:15,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 13:28:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:15,638 INFO L225 Difference]: With dead ends: 8108 [2021-11-23 13:28:15,638 INFO L226 Difference]: Without dead ends: 4826 [2021-11-23 13:28:15,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:28:15,645 INFO L933 BasicCegarLoop]: 1519 mSDtfsCounter, 4627 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:15,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 3022 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-23 13:28:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-23 13:28:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.50787728026534) internal successors, (7274), 4825 states have internal predecessors, (7274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7274 transitions. [2021-11-23 13:28:15,904 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7274 transitions. Word has length 67 [2021-11-23 13:28:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:15,905 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7274 transitions. [2021-11-23 13:28:15,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7274 transitions. [2021-11-23 13:28:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:28:15,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:15,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:15,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:28:15,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2021-11-23 13:28:15,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718646488] [2021-11-23 13:28:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:15,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:16,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718646488] [2021-11-23 13:28:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718646488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:16,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:16,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:28:16,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409823994] [2021-11-23 13:28:16,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:16,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:28:16,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:28:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:28:16,009 INFO L87 Difference]: Start difference. First operand 4826 states and 7274 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:16,338 INFO L93 Difference]: Finished difference Result 8108 states and 12043 transitions. [2021-11-23 13:28:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:28:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 13:28:16,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:16,350 INFO L225 Difference]: With dead ends: 8108 [2021-11-23 13:28:16,350 INFO L226 Difference]: Without dead ends: 4826 [2021-11-23 13:28:16,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:28:16,358 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 4660 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4660 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:16,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4660 Valid, 3023 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-23 13:28:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-23 13:28:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.497927031509121) internal successors, (7226), 4825 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7226 transitions. [2021-11-23 13:28:16,635 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7226 transitions. Word has length 67 [2021-11-23 13:28:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:16,635 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7226 transitions. [2021-11-23 13:28:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7226 transitions. [2021-11-23 13:28:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:28:16,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:16,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:28:16,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:28:16,638 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:16,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:16,638 INFO L85 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2021-11-23 13:28:16,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:16,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138318486] [2021-11-23 13:28:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:16,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:16,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138318486] [2021-11-23 13:28:16,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138318486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:16,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:16,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:28:16,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228640604] [2021-11-23 13:28:16,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:16,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:28:16,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:28:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:28:16,711 INFO L87 Difference]: Start difference. First operand 4826 states and 7226 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:17,246 INFO L93 Difference]: Finished difference Result 7669 states and 11200 transitions. [2021-11-23 13:28:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:28:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 13:28:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:17,265 INFO L225 Difference]: With dead ends: 7669 [2021-11-23 13:28:17,265 INFO L226 Difference]: Without dead ends: 7667 [2021-11-23 13:28:17,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:28:17,270 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 211 mSDsluCounter, 4661 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 6242 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:17,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 6242 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:28:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2021-11-23 13:28:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2021-11-23 13:28:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.4756778309409888) internal successors, (7402), 5017 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7402 transitions. [2021-11-23 13:28:17,642 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7402 transitions. Word has length 67 [2021-11-23 13:28:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:17,642 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 7402 transitions. [2021-11-23 13:28:17,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7402 transitions. [2021-11-23 13:28:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 13:28:17,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:17,646 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:17,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:28:17,646 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1062135174, now seen corresponding path program 1 times [2021-11-23 13:28:17,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:17,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313197226] [2021-11-23 13:28:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:17,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:17,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:17,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313197226] [2021-11-23 13:28:17,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313197226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:17,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:17,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:28:17,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570098373] [2021-11-23 13:28:17,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:17,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:17,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:17,703 INFO L87 Difference]: Start difference. First operand 5018 states and 7402 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:22,212 INFO L93 Difference]: Finished difference Result 8024 states and 12329 transitions. [2021-11-23 13:28:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:22,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 13:28:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:22,230 INFO L225 Difference]: With dead ends: 8024 [2021-11-23 13:28:22,230 INFO L226 Difference]: Without dead ends: 6520 [2021-11-23 13:28:22,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:22,235 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 753 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:22,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1391 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 13:28:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2021-11-23 13:28:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6520. [2021-11-23 13:28:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6520 states, 6518 states have (on average 1.4664007364222154) internal successors, (9558), 6519 states have internal predecessors, (9558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9558 transitions. [2021-11-23 13:28:22,588 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9558 transitions. Word has length 87 [2021-11-23 13:28:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:22,588 INFO L470 AbstractCegarLoop]: Abstraction has 6520 states and 9558 transitions. [2021-11-23 13:28:22,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9558 transitions. [2021-11-23 13:28:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 13:28:22,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:22,593 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:22,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:28:22,594 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:22,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2038194161, now seen corresponding path program 1 times [2021-11-23 13:28:22,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:22,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418986615] [2021-11-23 13:28:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:22,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:22,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:22,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418986615] [2021-11-23 13:28:22,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418986615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:22,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:22,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:28:22,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198386818] [2021-11-23 13:28:22,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:22,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:22,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:22,663 INFO L87 Difference]: Start difference. First operand 6520 states and 9558 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:26,472 INFO L93 Difference]: Finished difference Result 11028 states and 16641 transitions. [2021-11-23 13:28:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-23 13:28:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:26,492 INFO L225 Difference]: With dead ends: 11028 [2021-11-23 13:28:26,493 INFO L226 Difference]: Without dead ends: 8022 [2021-11-23 13:28:26,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:26,498 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 842 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:26,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 271 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 13:28:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2021-11-23 13:28:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 8022. [2021-11-23 13:28:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8020 states have (on average 1.4884039900249377) internal successors, (11937), 8021 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 11937 transitions. [2021-11-23 13:28:26,850 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 11937 transitions. Word has length 90 [2021-11-23 13:28:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:26,850 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 11937 transitions. [2021-11-23 13:28:26,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 11937 transitions. [2021-11-23 13:28:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 13:28:26,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:26,855 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:26,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:28:26,855 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1862975888, now seen corresponding path program 1 times [2021-11-23 13:28:26,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47749641] [2021-11-23 13:28:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:26,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:26,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:26,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47749641] [2021-11-23 13:28:26,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47749641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:26,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:26,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:28:26,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104810521] [2021-11-23 13:28:26,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:26,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:28:26,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:28:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:26,926 INFO L87 Difference]: Start difference. First operand 8022 states and 11937 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:30,202 INFO L93 Difference]: Finished difference Result 17036 states and 25934 transitions. [2021-11-23 13:28:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:28:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 13:28:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:30,228 INFO L225 Difference]: With dead ends: 17036 [2021-11-23 13:28:30,228 INFO L226 Difference]: Without dead ends: 12528 [2021-11-23 13:28:30,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:28:30,236 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 890 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:30,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 564 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 13:28:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12528 states. [2021-11-23 13:28:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12528 to 12528. [2021-11-23 13:28:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12528 states, 12526 states have (on average 1.3914258342647294) internal successors, (17429), 12527 states have internal predecessors, (17429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12528 states to 12528 states and 17429 transitions. [2021-11-23 13:28:30,591 INFO L78 Accepts]: Start accepts. Automaton has 12528 states and 17429 transitions. Word has length 91 [2021-11-23 13:28:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:30,592 INFO L470 AbstractCegarLoop]: Abstraction has 12528 states and 17429 transitions. [2021-11-23 13:28:30,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 12528 states and 17429 transitions. [2021-11-23 13:28:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:28:30,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:30,596 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:30,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:28:30,597 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2021-11-23 13:28:30,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:30,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644364908] [2021-11-23 13:28:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:30,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:28:30,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:30,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644364908] [2021-11-23 13:28:30,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644364908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:30,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:30,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:28:30,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985946739] [2021-11-23 13:28:30,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:30,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:28:30,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:30,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:28:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:30,690 INFO L87 Difference]: Start difference. First operand 12528 states and 17429 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:31,718 INFO L93 Difference]: Finished difference Result 30604 states and 42859 transitions. [2021-11-23 13:28:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:28:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 13:28:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:31,761 INFO L225 Difference]: With dead ends: 30604 [2021-11-23 13:28:31,761 INFO L226 Difference]: Without dead ends: 27130 [2021-11-23 13:28:31,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:28:31,772 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6579 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6579 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:31,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6579 Valid, 3547 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27130 states. [2021-11-23 13:28:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27130 to 16000. [2021-11-23 13:28:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16000 states, 15998 states have (on average 1.3924865608201025) internal successors, (22277), 15999 states have internal predecessors, (22277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16000 states to 16000 states and 22277 transitions. [2021-11-23 13:28:32,599 INFO L78 Accepts]: Start accepts. Automaton has 16000 states and 22277 transitions. Word has length 95 [2021-11-23 13:28:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:32,600 INFO L470 AbstractCegarLoop]: Abstraction has 16000 states and 22277 transitions. [2021-11-23 13:28:32,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 16000 states and 22277 transitions. [2021-11-23 13:28:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:28:32,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:32,605 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:32,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:28:32,606 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2021-11-23 13:28:32,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:32,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740706820] [2021-11-23 13:28:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:32,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:28:32,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740706820] [2021-11-23 13:28:32,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740706820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:32,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:32,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:28:32,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853421953] [2021-11-23 13:28:32,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:32,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:28:32,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:28:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:32,717 INFO L87 Difference]: Start difference. First operand 16000 states and 22277 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:34,153 INFO L93 Difference]: Finished difference Result 34076 states and 47707 transitions. [2021-11-23 13:28:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:28:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 13:28:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:34,187 INFO L225 Difference]: With dead ends: 34076 [2021-11-23 13:28:34,187 INFO L226 Difference]: Without dead ends: 30602 [2021-11-23 13:28:34,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:28:34,199 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6478 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6478 SdHoareTripleChecker+Valid, 3598 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:34,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6478 Valid, 3598 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30602 states. [2021-11-23 13:28:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30602 to 21216. [2021-11-23 13:28:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21216 states, 21214 states have (on average 1.3910153672103327) internal successors, (29509), 21215 states have internal predecessors, (29509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21216 states to 21216 states and 29509 transitions. [2021-11-23 13:28:35,187 INFO L78 Accepts]: Start accepts. Automaton has 21216 states and 29509 transitions. Word has length 95 [2021-11-23 13:28:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:35,187 INFO L470 AbstractCegarLoop]: Abstraction has 21216 states and 29509 transitions. [2021-11-23 13:28:35,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21216 states and 29509 transitions. [2021-11-23 13:28:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:28:35,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:35,193 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:35,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:28:35,193 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:35,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2021-11-23 13:28:35,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:35,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157876944] [2021-11-23 13:28:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:35,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:28:35,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157876944] [2021-11-23 13:28:35,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157876944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:35,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:35,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:28:35,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724607248] [2021-11-23 13:28:35,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:35,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:28:35,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:28:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:35,272 INFO L87 Difference]: Start difference. First operand 21216 states and 29509 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:36,789 INFO L93 Difference]: Finished difference Result 37548 states and 52555 transitions. [2021-11-23 13:28:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:28:36,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 13:28:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:36,824 INFO L225 Difference]: With dead ends: 37548 [2021-11-23 13:28:36,824 INFO L226 Difference]: Without dead ends: 34074 [2021-11-23 13:28:36,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:28:36,833 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6494 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6494 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:36,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6494 Valid, 3610 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34074 states. [2021-11-23 13:28:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34074 to 24688. [2021-11-23 13:28:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24688 states, 24686 states have (on average 1.3917605120311107) internal successors, (34357), 24687 states have internal predecessors, (34357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24688 states to 24688 states and 34357 transitions. [2021-11-23 13:28:38,302 INFO L78 Accepts]: Start accepts. Automaton has 24688 states and 34357 transitions. Word has length 95 [2021-11-23 13:28:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:38,303 INFO L470 AbstractCegarLoop]: Abstraction has 24688 states and 34357 transitions. [2021-11-23 13:28:38,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 24688 states and 34357 transitions. [2021-11-23 13:28:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:28:38,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:38,310 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:38,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:28:38,310 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2021-11-23 13:28:38,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343102391] [2021-11-23 13:28:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:38,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:28:38,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:38,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343102391] [2021-11-23 13:28:38,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343102391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:38,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:38,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:28:38,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319585211] [2021-11-23 13:28:38,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:38,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:28:38,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:28:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:38,403 INFO L87 Difference]: Start difference. First operand 24688 states and 34357 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:40,008 INFO L93 Difference]: Finished difference Result 41020 states and 57403 transitions. [2021-11-23 13:28:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:28:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 13:28:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:40,045 INFO L225 Difference]: With dead ends: 41020 [2021-11-23 13:28:40,045 INFO L226 Difference]: Without dead ends: 37546 [2021-11-23 13:28:40,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:28:40,055 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 6562 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6562 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:40,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6562 Valid, 3614 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37546 states. [2021-11-23 13:28:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37546 to 28160. [2021-11-23 13:28:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28160 states, 28158 states have (on average 1.3923218978620642) internal successors, (39205), 28159 states have internal predecessors, (39205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28160 states to 28160 states and 39205 transitions. [2021-11-23 13:28:41,449 INFO L78 Accepts]: Start accepts. Automaton has 28160 states and 39205 transitions. Word has length 95 [2021-11-23 13:28:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:41,450 INFO L470 AbstractCegarLoop]: Abstraction has 28160 states and 39205 transitions. [2021-11-23 13:28:41,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 28160 states and 39205 transitions. [2021-11-23 13:28:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:28:41,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:41,458 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:41,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 13:28:41,458 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2021-11-23 13:28:41,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:41,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79831304] [2021-11-23 13:28:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:41,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:28:41,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79831304] [2021-11-23 13:28:41,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79831304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:28:41,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:28:41,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:28:41,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537093868] [2021-11-23 13:28:41,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:28:41,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:28:41,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:41,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:28:41,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:28:41,533 INFO L87 Difference]: Start difference. First operand 28160 states and 39205 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:28:43,846 INFO L93 Difference]: Finished difference Result 42412 states and 59371 transitions. [2021-11-23 13:28:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:28:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 13:28:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:28:43,887 INFO L225 Difference]: With dead ends: 42412 [2021-11-23 13:28:43,887 INFO L226 Difference]: Without dead ends: 39978 [2021-11-23 13:28:43,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:28:43,898 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 6561 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6561 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:28:43,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6561 Valid, 3543 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:28:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39978 states. [2021-11-23 13:28:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39978 to 30592. [2021-11-23 13:28:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30592 states, 30590 states have (on average 1.3935599869238313) internal successors, (42629), 30591 states have internal predecessors, (42629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30592 states to 30592 states and 42629 transitions. [2021-11-23 13:28:45,432 INFO L78 Accepts]: Start accepts. Automaton has 30592 states and 42629 transitions. Word has length 95 [2021-11-23 13:28:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:28:45,433 INFO L470 AbstractCegarLoop]: Abstraction has 30592 states and 42629 transitions. [2021-11-23 13:28:45,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:28:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 30592 states and 42629 transitions. [2021-11-23 13:28:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 13:28:45,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:28:45,439 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:28:45,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 13:28:45,440 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:28:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:28:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2021-11-23 13:28:45,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:28:45,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492944008] [2021-11-23 13:28:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:45,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:28:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:45,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:28:45,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492944008] [2021-11-23 13:28:45,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492944008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:28:45,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42207826] [2021-11-23 13:28:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:28:45,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:28:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:28:45,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:28:45,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf311d0e-b7df-4ad6-9afc-403cf2fbc983/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:28:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:28:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:28:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:28:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:46,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:28:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:28:46,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42207826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:28:46,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:28:47,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-11-23 13:28:47,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551591351] [2021-11-23 13:28:47,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:28:47,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 13:28:47,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:28:47,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 13:28:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:28:47,002 INFO L87 Difference]: Start difference. First operand 30592 states and 42629 transitions. Second operand has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:29:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:29:16,635 INFO L93 Difference]: Finished difference Result 306118 states and 424210 transitions. [2021-11-23 13:29:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-11-23 13:29:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 13:29:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:29:17,195 INFO L225 Difference]: With dead ends: 306118 [2021-11-23 13:29:17,195 INFO L226 Difference]: Without dead ends: 282424 [2021-11-23 13:29:17,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23324 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7066, Invalid=45604, Unknown=0, NotChecked=0, Total=52670 [2021-11-23 13:29:17,280 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 23063 mSDsluCounter, 11744 mSDsCounter, 0 mSdLazyCounter, 5232 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23063 SdHoareTripleChecker+Valid, 13521 SdHoareTripleChecker+Invalid, 5887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 5232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:29:17,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23063 Valid, 13521 Invalid, 5887 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [655 Valid, 5232 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 13:29:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282424 states.