./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.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_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/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_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/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_a573f88c-b6ca-41b3-8445-5c7851e2c912/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 3f728e04159b75fd4f86d9e171d07387390897d2fdfdd24db8ac526a2f9d83e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:02:08,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:02:08,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:02:08,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:02:08,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:02:08,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:02:08,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:02:08,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:02:08,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:02:08,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:02:08,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:02:08,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:02:08,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:02:08,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:02:08,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:02:08,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:02:08,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:02:08,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:02:08,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:02:08,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:02:08,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:02:08,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:02:08,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:02:08,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:02:08,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:02:08,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:02:08,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:02:08,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:02:08,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:02:08,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:02:08,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:02:08,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:02:08,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:02:08,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:02:08,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:02:08,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:02:08,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:02:08,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:02:08,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:02:08,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:02:08,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:02:08,267 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:02:08,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:02:08,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:02:08,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:02:08,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:02:08,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:02:08,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:02:08,333 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:02:08,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:02:08,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:02:08,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:02:08,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:02:08,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:02:08,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:02:08,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:02:08,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:02:08,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:02:08,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:02:08,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:02:08,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:02:08,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:02:08,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:02:08,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:02:08,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:02:08,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:02:08,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:02:08,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:02:08,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:02:08,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:02:08,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:02:08,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:02:08,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:02:08,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:02:08,344 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_a573f88c-b6ca-41b3-8445-5c7851e2c912/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f728e04159b75fd4f86d9e171d07387390897d2fdfdd24db8ac526a2f9d83e1 [2021-11-23 14:02:08,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:02:08,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:02:08,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:02:08,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:02:08,705 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:02:08,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2021-11-23 14:02:08,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/data/eaa315bd9/4bbcea00fb30467e8ede5cc98ea0409f/FLAGc7c20ac3c [2021-11-23 14:02:09,463 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:02:09,464 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2021-11-23 14:02:09,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/data/eaa315bd9/4bbcea00fb30467e8ede5cc98ea0409f/FLAGc7c20ac3c [2021-11-23 14:02:09,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/data/eaa315bd9/4bbcea00fb30467e8ede5cc98ea0409f [2021-11-23 14:02:09,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:02:09,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:02:09,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:02:09,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:02:09,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:02:09,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:09" (1/1) ... [2021-11-23 14:02:09,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6450bc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09, skipping insertion in model container [2021-11-23 14:02:09,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:09" (1/1) ... [2021-11-23 14:02:09,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:02:09,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:02:10,173 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_a573f88c-b6ca-41b3-8445-5c7851e2c912/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2021-11-23 14:02:10,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:02:10,190 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:02:10,285 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_a573f88c-b6ca-41b3-8445-5c7851e2c912/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2021-11-23 14:02:10,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:02:10,310 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:02:10,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10 WrapperNode [2021-11-23 14:02:10,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:02:10,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:02:10,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:02:10,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:02:10,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,457 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 441 [2021-11-23 14:02:10,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:02:10,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:02:10,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:02:10,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:02:10,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:02:10,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:02:10,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:02:10,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:02:10,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (1/1) ... [2021-11-23 14:02:10,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:02:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:02:10,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:02:10,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a573f88c-b6ca-41b3-8445-5c7851e2c912/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:02:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:02:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:02:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:02:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:02:10,856 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:02:10,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:02:11,697 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:02:11,710 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:02:11,710 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:02:11,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:11 BoogieIcfgContainer [2021-11-23 14:02:11,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:02:11,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:02:11,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:02:11,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:02:11,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:02:09" (1/3) ... [2021-11-23 14:02:11,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e72844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:11, skipping insertion in model container [2021-11-23 14:02:11,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:10" (2/3) ... [2021-11-23 14:02:11,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e72844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:11, skipping insertion in model container [2021-11-23 14:02:11,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:11" (3/3) ... [2021-11-23 14:02:11,726 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c [2021-11-23 14:02:11,732 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:02:11,732 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:02:11,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:02:11,800 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 14:02:11,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 14:02:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 14:02:11,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:11,837 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] [2021-11-23 14:02:11,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2021-11-23 14:02:11,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:11,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233080228] [2021-11-23 14:02:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:11,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:12,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:12,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233080228] [2021-11-23 14:02:12,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233080228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:12,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:12,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:02:12,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493364958] [2021-11-23 14:02:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:12,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 14:02:12,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 14:02:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:02:12,214 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:12,269 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2021-11-23 14:02:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 14:02:12,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-23 14:02:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:12,285 INFO L225 Difference]: With dead ends: 206 [2021-11-23 14:02:12,286 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 14:02:12,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:02:12,295 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:12,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 14:02:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-23 14:02:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.746031746031746) internal successors, (220), 126 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2021-11-23 14:02:12,355 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2021-11-23 14:02:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:12,356 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2021-11-23 14:02:12,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2021-11-23 14:02:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 14:02:12,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:12,360 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] [2021-11-23 14:02:12,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:02:12,361 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:12,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2021-11-23 14:02:12,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:12,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972682360] [2021-11-23 14:02:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:12,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:12,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:12,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972682360] [2021-11-23 14:02:12,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972682360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:12,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522973711] [2021-11-23 14:02:12,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:12,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:12,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:12,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:12,607 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:12,796 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2021-11-23 14:02:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:02:12,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-23 14:02:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:12,801 INFO L225 Difference]: With dead ends: 271 [2021-11-23 14:02:12,806 INFO L226 Difference]: Without dead ends: 197 [2021-11-23 14:02:12,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:02:12,811 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 120 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:12,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 832 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-23 14:02:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2021-11-23 14:02:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5317460317460319) internal successors, (193), 126 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2021-11-23 14:02:12,850 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2021-11-23 14:02:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:12,851 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2021-11-23 14:02:12,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2021-11-23 14:02:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 14:02:12,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:12,855 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] [2021-11-23 14:02:12,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:02:12,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2021-11-23 14:02:12,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:12,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130361116] [2021-11-23 14:02:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:12,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:13,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:13,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130361116] [2021-11-23 14:02:13,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130361116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:13,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:13,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:02:13,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99699691] [2021-11-23 14:02:13,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:13,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:02:13,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:13,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:02:13,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,035 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:13,144 INFO L93 Difference]: Finished difference Result 258 states and 412 transitions. [2021-11-23 14:02:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:02:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-23 14:02:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:13,153 INFO L225 Difference]: With dead ends: 258 [2021-11-23 14:02:13,153 INFO L226 Difference]: Without dead ends: 188 [2021-11-23 14:02:13,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,156 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:13,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 421 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:13,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-23 14:02:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-11-23 14:02:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5567567567567568) internal successors, (288), 185 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2021-11-23 14:02:13,183 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 63 [2021-11-23 14:02:13,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:13,184 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2021-11-23 14:02:13,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,184 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2021-11-23 14:02:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 14:02:13,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:13,188 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] [2021-11-23 14:02:13,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:02:13,189 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2021-11-23 14:02:13,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:13,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239418365] [2021-11-23 14:02:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:13,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:13,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239418365] [2021-11-23 14:02:13,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239418365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:13,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:13,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:02:13,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153266403] [2021-11-23 14:02:13,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:13,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:02:13,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:02:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,334 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:13,387 INFO L93 Difference]: Finished difference Result 313 states and 501 transitions. [2021-11-23 14:02:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:02:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 14:02:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:13,399 INFO L225 Difference]: With dead ends: 313 [2021-11-23 14:02:13,399 INFO L226 Difference]: Without dead ends: 243 [2021-11-23 14:02:13,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,408 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 102 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 441 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 14:02:13,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 441 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-23 14:02:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2021-11-23 14:02:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5833333333333333) internal successors, (380), 240 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2021-11-23 14:02:13,450 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 65 [2021-11-23 14:02:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:13,451 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2021-11-23 14:02:13,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2021-11-23 14:02:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 14:02:13,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:13,455 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] [2021-11-23 14:02:13,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 14:02:13,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2021-11-23 14:02:13,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:13,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357464715] [2021-11-23 14:02:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:13,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:13,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357464715] [2021-11-23 14:02:13,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357464715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:13,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:13,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:02:13,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212442460] [2021-11-23 14:02:13,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:13,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:02:13,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:02:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,610 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:13,673 INFO L93 Difference]: Finished difference Result 584 states and 947 transitions. [2021-11-23 14:02:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:02:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 14:02:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:13,678 INFO L225 Difference]: With dead ends: 584 [2021-11-23 14:02:13,678 INFO L226 Difference]: Without dead ends: 402 [2021-11-23 14:02:13,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,691 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 95 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:13,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 428 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-23 14:02:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2021-11-23 14:02:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.6040100250626566) internal successors, (640), 399 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 640 transitions. [2021-11-23 14:02:13,735 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 640 transitions. Word has length 65 [2021-11-23 14:02:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:13,735 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 640 transitions. [2021-11-23 14:02:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 640 transitions. [2021-11-23 14:02:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 14:02:13,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:13,739 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 14:02:13,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:02:13,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2021-11-23 14:02:13,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:13,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407986729] [2021-11-23 14:02:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:13,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:13,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:13,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407986729] [2021-11-23 14:02:13,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407986729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:13,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:13,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:02:13,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103299762] [2021-11-23 14:02:13,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:13,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:02:13,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:02:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,811 INFO L87 Difference]: Start difference. First operand 400 states and 640 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 14:02:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:13,867 INFO L93 Difference]: Finished difference Result 729 states and 1183 transitions. [2021-11-23 14:02:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:02:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 14:02:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:13,873 INFO L225 Difference]: With dead ends: 729 [2021-11-23 14:02:13,874 INFO L226 Difference]: Without dead ends: 547 [2021-11-23 14:02:13,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:13,878 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 96 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 427 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 14:02:13,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 427 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-23 14:02:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2021-11-23 14:02:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.6084558823529411) internal successors, (875), 544 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 875 transitions. [2021-11-23 14:02:13,923 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 875 transitions. Word has length 67 [2021-11-23 14:02:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:13,924 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 875 transitions. [2021-11-23 14:02:13,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 14:02:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 875 transitions. [2021-11-23 14:02:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 14:02:13,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:13,927 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 14:02:13,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 14:02:13,928 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:13,929 INFO L85 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2021-11-23 14:02:13,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:13,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220256078] [2021-11-23 14:02:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:13,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:14,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:14,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220256078] [2021-11-23 14:02:14,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220256078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:14,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:14,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:02:14,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207749656] [2021-11-23 14:02:14,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:14,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:02:14,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:02:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:14,041 INFO L87 Difference]: Start difference. First operand 545 states and 875 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 14:02:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:14,112 INFO L93 Difference]: Finished difference Result 1434 states and 2326 transitions. [2021-11-23 14:02:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:02:14,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 14:02:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:14,121 INFO L225 Difference]: With dead ends: 1434 [2021-11-23 14:02:14,121 INFO L226 Difference]: Without dead ends: 958 [2021-11-23 14:02:14,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:14,127 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 89 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:14,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 415 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-23 14:02:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2021-11-23 14:02:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.6041884816753926) internal successors, (1532), 955 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1532 transitions. [2021-11-23 14:02:14,191 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1532 transitions. Word has length 67 [2021-11-23 14:02:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:14,192 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1532 transitions. [2021-11-23 14:02:14,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 14:02:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1532 transitions. [2021-11-23 14:02:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 14:02:14,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:14,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:14,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 14:02:14,195 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2021-11-23 14:02:14,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:14,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331681604] [2021-11-23 14:02:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:14,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:14,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:14,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331681604] [2021-11-23 14:02:14,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331681604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:14,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:14,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:02:14,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516824426] [2021-11-23 14:02:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:14,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:02:14,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:02:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:14,285 INFO L87 Difference]: Start difference. First operand 956 states and 1532 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:14,342 INFO L93 Difference]: Finished difference Result 1783 states and 2881 transitions. [2021-11-23 14:02:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:02:14,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 14:02:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:14,353 INFO L225 Difference]: With dead ends: 1783 [2021-11-23 14:02:14,354 INFO L226 Difference]: Without dead ends: 1307 [2021-11-23 14:02:14,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:02:14,357 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 90 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 413 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 14:02:14,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 413 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-11-23 14:02:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1305. [2021-11-23 14:02:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 1.5996932515337423) internal successors, (2086), 1304 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2086 transitions. [2021-11-23 14:02:14,428 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2086 transitions. Word has length 69 [2021-11-23 14:02:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:14,432 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 2086 transitions. [2021-11-23 14:02:14,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2086 transitions. [2021-11-23 14:02:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 14:02:14,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:14,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:14,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 14:02:14,442 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2021-11-23 14:02:14,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:14,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734758432] [2021-11-23 14:02:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:14,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:14,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734758432] [2021-11-23 14:02:14,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734758432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:14,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:14,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:14,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143789287] [2021-11-23 14:02:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:14,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:14,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:14,563 INFO L87 Difference]: Start difference. First operand 1305 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:14,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:14,942 INFO L93 Difference]: Finished difference Result 6582 states and 10723 transitions. [2021-11-23 14:02:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 14:02:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 14:02:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:14,984 INFO L225 Difference]: With dead ends: 6582 [2021-11-23 14:02:14,984 INFO L226 Difference]: Without dead ends: 5356 [2021-11-23 14:02:14,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 14:02:14,992 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 774 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:14,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1196 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2021-11-23 14:02:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 2452. [2021-11-23 14:02:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 1.5968992248062015) internal successors, (3914), 2451 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3914 transitions. [2021-11-23 14:02:15,179 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3914 transitions. Word has length 69 [2021-11-23 14:02:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:15,179 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 3914 transitions. [2021-11-23 14:02:15,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3914 transitions. [2021-11-23 14:02:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 14:02:15,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:15,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:15,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 14:02:15,182 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2021-11-23 14:02:15,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:15,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586929450] [2021-11-23 14:02:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:15,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:15,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:15,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586929450] [2021-11-23 14:02:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586929450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:15,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:15,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:02:15,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015643107] [2021-11-23 14:02:15,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:15,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:02:15,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:02:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:02:15,274 INFO L87 Difference]: Start difference. First operand 2452 states and 3914 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:15,627 INFO L93 Difference]: Finished difference Result 7943 states and 12835 transitions. [2021-11-23 14:02:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:02:15,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 14:02:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:15,670 INFO L225 Difference]: With dead ends: 7943 [2021-11-23 14:02:15,670 INFO L226 Difference]: Without dead ends: 5570 [2021-11-23 14:02:15,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:15,677 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 338 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:15,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 626 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:15,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-11-23 14:02:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3992. [2021-11-23 14:02:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3991 states have (on average 1.5995990979704335) internal successors, (6384), 3991 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6384 transitions. [2021-11-23 14:02:15,992 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6384 transitions. Word has length 70 [2021-11-23 14:02:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:15,993 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 6384 transitions. [2021-11-23 14:02:15,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6384 transitions. [2021-11-23 14:02:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 14:02:15,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:15,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:15,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 14:02:15,996 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2021-11-23 14:02:15,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985066385] [2021-11-23 14:02:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:15,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:16,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985066385] [2021-11-23 14:02:16,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985066385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:16,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:16,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:02:16,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129937740] [2021-11-23 14:02:16,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:16,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:02:16,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:16,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:02:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:02:16,073 INFO L87 Difference]: Start difference. First operand 3992 states and 6384 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:16,542 INFO L93 Difference]: Finished difference Result 12755 states and 20495 transitions. [2021-11-23 14:02:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:02:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 14:02:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:16,637 INFO L225 Difference]: With dead ends: 12755 [2021-11-23 14:02:16,637 INFO L226 Difference]: Without dead ends: 8842 [2021-11-23 14:02:16,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:16,646 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 336 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:16,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 623 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8842 states. [2021-11-23 14:02:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8842 to 6388. [2021-11-23 14:02:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6388 states, 6387 states have (on average 1.5913574448097698) internal successors, (10164), 6387 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 10164 transitions. [2021-11-23 14:02:17,116 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 10164 transitions. Word has length 71 [2021-11-23 14:02:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:17,117 INFO L470 AbstractCegarLoop]: Abstraction has 6388 states and 10164 transitions. [2021-11-23 14:02:17,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 10164 transitions. [2021-11-23 14:02:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 14:02:17,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:17,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:17,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 14:02:17,121 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:17,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2021-11-23 14:02:17,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:17,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787625725] [2021-11-23 14:02:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:17,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:17,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787625725] [2021-11-23 14:02:17,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787625725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:17,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:17,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:02:17,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141567850] [2021-11-23 14:02:17,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:17,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:02:17,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:02:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:02:17,206 INFO L87 Difference]: Start difference. First operand 6388 states and 10164 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:17,902 INFO L93 Difference]: Finished difference Result 20047 states and 32019 transitions. [2021-11-23 14:02:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:02:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 14:02:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:17,936 INFO L225 Difference]: With dead ends: 20047 [2021-11-23 14:02:17,937 INFO L226 Difference]: Without dead ends: 13738 [2021-11-23 14:02:17,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:17,946 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 334 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:17,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 625 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13738 states. [2021-11-23 14:02:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13738 to 10020. [2021-11-23 14:02:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10020 states, 10019 states have (on average 1.582593073160994) internal successors, (15856), 10019 states have internal predecessors, (15856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10020 states to 10020 states and 15856 transitions. [2021-11-23 14:02:18,564 INFO L78 Accepts]: Start accepts. Automaton has 10020 states and 15856 transitions. Word has length 72 [2021-11-23 14:02:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:18,565 INFO L470 AbstractCegarLoop]: Abstraction has 10020 states and 15856 transitions. [2021-11-23 14:02:18,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 10020 states and 15856 transitions. [2021-11-23 14:02:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 14:02:18,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:18,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:18,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 14:02:18,568 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2021-11-23 14:02:18,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109564375] [2021-11-23 14:02:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:18,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:18,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:18,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109564375] [2021-11-23 14:02:18,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109564375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:18,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:18,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:18,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35236694] [2021-11-23 14:02:18,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:18,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:18,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:18,747 INFO L87 Difference]: Start difference. First operand 10020 states and 15856 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:19,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:19,381 INFO L93 Difference]: Finished difference Result 19963 states and 31608 transitions. [2021-11-23 14:02:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:02:19,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-23 14:02:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:19,417 INFO L225 Difference]: With dead ends: 19963 [2021-11-23 14:02:19,417 INFO L226 Difference]: Without dead ends: 10022 [2021-11-23 14:02:19,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:02:19,437 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 159 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:19,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 677 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-11-23 14:02:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 10020. [2021-11-23 14:02:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10020 states, 10019 states have (on average 1.570116778121569) internal successors, (15731), 10019 states have internal predecessors, (15731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10020 states to 10020 states and 15731 transitions. [2021-11-23 14:02:20,138 INFO L78 Accepts]: Start accepts. Automaton has 10020 states and 15731 transitions. Word has length 74 [2021-11-23 14:02:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:20,138 INFO L470 AbstractCegarLoop]: Abstraction has 10020 states and 15731 transitions. [2021-11-23 14:02:20,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10020 states and 15731 transitions. [2021-11-23 14:02:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 14:02:20,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:20,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:20,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 14:02:20,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash 251102324, now seen corresponding path program 1 times [2021-11-23 14:02:20,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:20,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028769659] [2021-11-23 14:02:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:20,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:20,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028769659] [2021-11-23 14:02:20,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028769659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:20,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:20,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:20,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889936900] [2021-11-23 14:02:20,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:20,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:20,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:20,333 INFO L87 Difference]: Start difference. First operand 10020 states and 15731 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:21,365 INFO L93 Difference]: Finished difference Result 28689 states and 45194 transitions. [2021-11-23 14:02:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:02:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 14:02:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:21,426 INFO L225 Difference]: With dead ends: 28689 [2021-11-23 14:02:21,427 INFO L226 Difference]: Without dead ends: 18748 [2021-11-23 14:02:21,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:02:21,442 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 243 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:21,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 519 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18748 states. [2021-11-23 14:02:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18748 to 18746. [2021-11-23 14:02:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18746 states, 18745 states have (on average 1.5565750866897838) internal successors, (29178), 18745 states have internal predecessors, (29178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18746 states to 18746 states and 29178 transitions. [2021-11-23 14:02:22,475 INFO L78 Accepts]: Start accepts. Automaton has 18746 states and 29178 transitions. Word has length 77 [2021-11-23 14:02:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:22,476 INFO L470 AbstractCegarLoop]: Abstraction has 18746 states and 29178 transitions. [2021-11-23 14:02:22,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 18746 states and 29178 transitions. [2021-11-23 14:02:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 14:02:22,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:22,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:22,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 14:02:22,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1234338215, now seen corresponding path program 1 times [2021-11-23 14:02:22,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473016501] [2021-11-23 14:02:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:22,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:02:22,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473016501] [2021-11-23 14:02:22,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473016501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:22,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:22,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:22,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064092372] [2021-11-23 14:02:22,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:22,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:22,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:22,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:22,623 INFO L87 Difference]: Start difference. First operand 18746 states and 29178 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:24,158 INFO L93 Difference]: Finished difference Result 36838 states and 56661 transitions. [2021-11-23 14:02:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 14:02:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 14:02:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:24,277 INFO L225 Difference]: With dead ends: 36838 [2021-11-23 14:02:24,277 INFO L226 Difference]: Without dead ends: 36836 [2021-11-23 14:02:24,286 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 14:02:24,287 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 296 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:24,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 827 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36836 states. [2021-11-23 14:02:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36836 to 19832. [2021-11-23 14:02:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19832 states, 19831 states have (on average 1.5256416721294943) internal successors, (30255), 19831 states have internal predecessors, (30255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19832 states to 19832 states and 30255 transitions. [2021-11-23 14:02:25,615 INFO L78 Accepts]: Start accepts. Automaton has 19832 states and 30255 transitions. Word has length 78 [2021-11-23 14:02:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:25,615 INFO L470 AbstractCegarLoop]: Abstraction has 19832 states and 30255 transitions. [2021-11-23 14:02:25,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 19832 states and 30255 transitions. [2021-11-23 14:02:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 14:02:25,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:25,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:25,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 14:02:25,620 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1630330772, now seen corresponding path program 1 times [2021-11-23 14:02:25,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:25,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347857307] [2021-11-23 14:02:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:25,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 14:02:25,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:25,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347857307] [2021-11-23 14:02:25,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347857307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:25,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:25,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:25,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718064330] [2021-11-23 14:02:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:25,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:25,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:25,700 INFO L87 Difference]: Start difference. First operand 19832 states and 30255 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:27,844 INFO L93 Difference]: Finished difference Result 48790 states and 74781 transitions. [2021-11-23 14:02:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:02:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-23 14:02:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:27,980 INFO L225 Difference]: With dead ends: 48790 [2021-11-23 14:02:27,980 INFO L226 Difference]: Without dead ends: 39128 [2021-11-23 14:02:28,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:02:28,002 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 423 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:28,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 767 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39128 states. [2021-11-23 14:02:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39128 to 30524. [2021-11-23 14:02:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30524 states, 30523 states have (on average 1.523539625855912) internal successors, (46503), 30523 states have internal predecessors, (46503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30524 states to 30524 states and 46503 transitions. [2021-11-23 14:02:29,591 INFO L78 Accepts]: Start accepts. Automaton has 30524 states and 46503 transitions. Word has length 103 [2021-11-23 14:02:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:29,591 INFO L470 AbstractCegarLoop]: Abstraction has 30524 states and 46503 transitions. [2021-11-23 14:02:29,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 30524 states and 46503 transitions. [2021-11-23 14:02:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 14:02:29,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:29,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:29,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 14:02:29,597 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -743960700, now seen corresponding path program 1 times [2021-11-23 14:02:29,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791536045] [2021-11-23 14:02:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:29,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:02:29,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:29,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791536045] [2021-11-23 14:02:29,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791536045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:29,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:29,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:29,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981119116] [2021-11-23 14:02:29,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:29,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:29,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:29,687 INFO L87 Difference]: Start difference. First operand 30524 states and 46503 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:31,604 INFO L93 Difference]: Finished difference Result 54722 states and 83891 transitions. [2021-11-23 14:02:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:02:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-23 14:02:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:31,691 INFO L225 Difference]: With dead ends: 54722 [2021-11-23 14:02:31,691 INFO L226 Difference]: Without dead ends: 45320 [2021-11-23 14:02:31,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:02:31,714 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 418 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:31,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 881 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45320 states. [2021-11-23 14:02:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45320 to 41442. [2021-11-23 14:02:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41442 states, 41441 states have (on average 1.525662990757945) internal successors, (63225), 41441 states have internal predecessors, (63225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41442 states to 41442 states and 63225 transitions. [2021-11-23 14:02:33,741 INFO L78 Accepts]: Start accepts. Automaton has 41442 states and 63225 transitions. Word has length 103 [2021-11-23 14:02:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:33,742 INFO L470 AbstractCegarLoop]: Abstraction has 41442 states and 63225 transitions. [2021-11-23 14:02:33,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 41442 states and 63225 transitions. [2021-11-23 14:02:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 14:02:33,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:33,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:33,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 14:02:33,748 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 910392184, now seen corresponding path program 1 times [2021-11-23 14:02:33,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786172964] [2021-11-23 14:02:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:33,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 14:02:33,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786172964] [2021-11-23 14:02:33,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786172964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:33,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:33,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:02:33,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026934961] [2021-11-23 14:02:33,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:33,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:02:33,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:02:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:33,827 INFO L87 Difference]: Start difference. First operand 41442 states and 63225 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:35,894 INFO L93 Difference]: Finished difference Result 58490 states and 89675 transitions. [2021-11-23 14:02:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:02:35,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-23 14:02:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:35,971 INFO L225 Difference]: With dead ends: 58490 [2021-11-23 14:02:35,972 INFO L226 Difference]: Without dead ends: 49088 [2021-11-23 14:02:35,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:02:35,990 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 422 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:35,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 841 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:36,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49088 states. [2021-11-23 14:02:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49088 to 47530. [2021-11-23 14:02:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47530 states, 47529 states have (on average 1.527846157083044) internal successors, (72617), 47529 states have internal predecessors, (72617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47530 states to 47530 states and 72617 transitions. [2021-11-23 14:02:38,006 INFO L78 Accepts]: Start accepts. Automaton has 47530 states and 72617 transitions. Word has length 103 [2021-11-23 14:02:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:38,006 INFO L470 AbstractCegarLoop]: Abstraction has 47530 states and 72617 transitions. [2021-11-23 14:02:38,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 47530 states and 72617 transitions. [2021-11-23 14:02:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 14:02:38,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:38,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:38,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 14:02:38,012 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash -923479025, now seen corresponding path program 1 times [2021-11-23 14:02:38,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:38,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72029364] [2021-11-23 14:02:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:38,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 14:02:38,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:38,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72029364] [2021-11-23 14:02:38,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72029364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:38,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:38,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:02:38,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878330875] [2021-11-23 14:02:38,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:38,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:02:38,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:38,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:02:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:02:38,085 INFO L87 Difference]: Start difference. First operand 47530 states and 72617 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:40,068 INFO L93 Difference]: Finished difference Result 77643 states and 119316 transitions. [2021-11-23 14:02:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:02:40,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-23 14:02:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:40,175 INFO L225 Difference]: With dead ends: 77643 [2021-11-23 14:02:40,175 INFO L226 Difference]: Without dead ends: 61789 [2021-11-23 14:02:40,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:02:40,194 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 187 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:40,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 575 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:02:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61789 states. [2021-11-23 14:02:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61789 to 60233. [2021-11-23 14:02:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60233 states, 60232 states have (on average 1.528240802231372) internal successors, (92049), 60232 states have internal predecessors, (92049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60233 states to 60233 states and 92049 transitions. [2021-11-23 14:02:42,753 INFO L78 Accepts]: Start accepts. Automaton has 60233 states and 92049 transitions. Word has length 104 [2021-11-23 14:02:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:42,754 INFO L470 AbstractCegarLoop]: Abstraction has 60233 states and 92049 transitions. [2021-11-23 14:02:42,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 60233 states and 92049 transitions. [2021-11-23 14:02:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 14:02:42,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:42,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:42,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 14:02:42,760 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:42,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:42,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1887965934, now seen corresponding path program 1 times [2021-11-23 14:02:42,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:42,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336341741] [2021-11-23 14:02:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:42,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 14:02:42,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:42,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336341741] [2021-11-23 14:02:42,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336341741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:42,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:42,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:02:42,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047324586] [2021-11-23 14:02:42,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:42,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:02:42,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:02:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:02:42,926 INFO L87 Difference]: Start difference. First operand 60233 states and 92049 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:47,455 INFO L93 Difference]: Finished difference Result 152987 states and 234564 transitions. [2021-11-23 14:02:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:02:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-23 14:02:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:02:47,632 INFO L225 Difference]: With dead ends: 152987 [2021-11-23 14:02:47,632 INFO L226 Difference]: Without dead ends: 110320 [2021-11-23 14:02:47,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:02:47,670 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 323 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:02:47,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 516 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:02:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110320 states. [2021-11-23 14:02:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110320 to 97876. [2021-11-23 14:02:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97876 states, 97875 states have (on average 1.5283269476372925) internal successors, (149585), 97875 states have internal predecessors, (149585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97876 states to 97876 states and 149585 transitions. [2021-11-23 14:02:52,178 INFO L78 Accepts]: Start accepts. Automaton has 97876 states and 149585 transitions. Word has length 104 [2021-11-23 14:02:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:02:52,178 INFO L470 AbstractCegarLoop]: Abstraction has 97876 states and 149585 transitions. [2021-11-23 14:02:52,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 97876 states and 149585 transitions. [2021-11-23 14:02:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 14:02:52,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:02:52,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:02:52,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 14:02:52,181 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:02:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:02:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash -954001054, now seen corresponding path program 1 times [2021-11-23 14:02:52,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:02:52,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54855136] [2021-11-23 14:02:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:02:52,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:02:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:02:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 14:02:52,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:02:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54855136] [2021-11-23 14:02:52,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54855136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:02:52,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:02:52,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:02:52,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514080099] [2021-11-23 14:02:52,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:02:52,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:02:52,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:02:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:02:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:02:52,335 INFO L87 Difference]: Start difference. First operand 97876 states and 149585 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:02:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:02:59,716 INFO L93 Difference]: Finished difference Result 227858 states and 349808 transitions. [2021-11-23 14:02:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:02:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-23 14:02:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:03:00,017 INFO L225 Difference]: With dead ends: 227858 [2021-11-23 14:03:00,017 INFO L226 Difference]: Without dead ends: 173491 [2021-11-23 14:03:00,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:03:00,075 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 327 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:03:00,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 539 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:03:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173491 states.