./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/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_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/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_90e3168f-60c1-4e23-9138-eeb49b8eae30/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 a82391ebb044799bad480df1878c271ded14d474016d9ad90c3e7a554ae5460f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:55:46,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:55:46,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:55:46,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:55:46,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:55:46,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:55:46,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:55:46,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:55:46,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:55:46,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:55:46,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:55:46,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:55:46,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:55:46,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:55:46,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:55:46,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:55:46,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:55:46,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:55:46,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:55:46,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:55:46,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:55:46,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:55:46,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:55:46,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:55:46,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:55:46,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:55:46,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:55:46,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:55:46,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:55:46,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:55:46,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:55:46,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:55:46,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:55:46,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:55:46,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:55:46,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:55:46,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:55:46,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:55:46,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:55:46,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:55:46,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:55:46,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:55:46,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:55:46,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:55:46,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:55:46,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:55:46,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:55:46,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:55:46,626 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:55:46,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:55:46,627 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:55:46,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:55:46,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:55:46,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:55:46,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:55:46,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:55:46,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:55:46,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:55:46,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:55:46,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:55:46,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:55:46,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:55:46,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:55:46,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:55:46,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:55:46,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:55:46,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:55:46,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:55:46,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:55:46,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:55:46,632 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:55:46,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:55:46,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:55:46,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:55:46,633 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_90e3168f-60c1-4e23-9138-eeb49b8eae30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a82391ebb044799bad480df1878c271ded14d474016d9ad90c3e7a554ae5460f [2021-11-23 13:55:46,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:55:46,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:55:46,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:55:46,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:55:46,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:55:46,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-23 13:55:46,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/data/4860dee83/21435d19001d487eab776598f993a3d3/FLAG03884073d [2021-11-23 13:55:47,518 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:55:47,519 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-23 13:55:47,528 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/data/4860dee83/21435d19001d487eab776598f993a3d3/FLAG03884073d [2021-11-23 13:55:47,887 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/data/4860dee83/21435d19001d487eab776598f993a3d3 [2021-11-23 13:55:47,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:55:47,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:55:47,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:55:47,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:55:47,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:55:47,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:47" (1/1) ... [2021-11-23 13:55:47,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eec4aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:47, skipping insertion in model container [2021-11-23 13:55:47,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:47" (1/1) ... [2021-11-23 13:55:47,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:55:47,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:55:48,167 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_90e3168f-60c1-4e23-9138-eeb49b8eae30/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2021-11-23 13:55:48,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:55:48,202 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:55:48,241 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_90e3168f-60c1-4e23-9138-eeb49b8eae30/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2021-11-23 13:55:48,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:55:48,278 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:55:48,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48 WrapperNode [2021-11-23 13:55:48,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:55:48,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:55:48,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:55:48,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:55:48,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,377 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 270 [2021-11-23 13:55:48,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:55:48,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:55:48,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:55:48,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:55:48,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:55:48,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:55:48,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:55:48,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:55:48,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (1/1) ... [2021-11-23 13:55:48,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:55:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:55:48,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:55:48,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:55:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:55:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:55:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:55:48,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:55:48,668 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:55:48,670 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:55:48,953 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:55:48,960 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:55:48,960 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 13:55:48,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:48 BoogieIcfgContainer [2021-11-23 13:55:48,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:55:48,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:55:48,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:55:48,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:55:48,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:55:47" (1/3) ... [2021-11-23 13:55:48,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87f4aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:48, skipping insertion in model container [2021-11-23 13:55:48,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:48" (2/3) ... [2021-11-23 13:55:48,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87f4aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:48, skipping insertion in model container [2021-11-23 13:55:48,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:48" (3/3) ... [2021-11-23 13:55:48,971 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-11-23 13:55:48,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:55:48,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:55:49,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:55:49,046 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:55:49,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:55:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 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 13:55:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 13:55:49,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:49,070 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] [2021-11-23 13:55:49,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2021-11-23 13:55:49,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743374487] [2021-11-23 13:55:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:49,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:49,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:49,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743374487] [2021-11-23 13:55:49,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743374487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:49,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:49,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:55:49,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541615458] [2021-11-23 13:55:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:49,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:55:49,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:49,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:55:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:49,395 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 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) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:49,456 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2021-11-23 13:55:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:55:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-23 13:55:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:49,470 INFO L225 Difference]: With dead ends: 140 [2021-11-23 13:55:49,470 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 13:55:49,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:49,478 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 68 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 13:55:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-11-23 13:55:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 88 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2021-11-23 13:55:49,550 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2021-11-23 13:55:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:49,552 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2021-11-23 13:55:49,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2021-11-23 13:55:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 13:55:49,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:49,555 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 13:55:49,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:55:49,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2021-11-23 13:55:49,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:49,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29311013] [2021-11-23 13:55:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:49,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:49,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29311013] [2021-11-23 13:55:49,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29311013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:49,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:49,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:55:49,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338328405] [2021-11-23 13:55:49,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:49,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:55:49,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:55:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:49,780 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 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 13:55:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:49,838 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2021-11-23 13:55:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:55:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 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 13:55:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:49,842 INFO L225 Difference]: With dead ends: 213 [2021-11-23 13:55:49,843 INFO L226 Difference]: Without dead ends: 143 [2021-11-23 13:55:49,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:49,846 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:49,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 182 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-23 13:55:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-11-23 13:55:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 140 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2021-11-23 13:55:49,882 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2021-11-23 13:55:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:49,883 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2021-11-23 13:55:49,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 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 13:55:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2021-11-23 13:55:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 13:55:49,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:49,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:55:49,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:55:49,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2021-11-23 13:55:49,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:49,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923420857] [2021-11-23 13:55:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:49,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:50,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:50,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923420857] [2021-11-23 13:55:50,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923420857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:50,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:50,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:55:50,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544249547] [2021-11-23 13:55:50,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:50,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:55:50,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:55:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:50,035 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:50,133 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2021-11-23 13:55:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:55:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-23 13:55:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:50,155 INFO L225 Difference]: With dead ends: 353 [2021-11-23 13:55:50,156 INFO L226 Difference]: Without dead ends: 231 [2021-11-23 13:55:50,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:50,164 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 43 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:50,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 178 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-23 13:55:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-11-23 13:55:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5263157894736843) internal successors, (348), 228 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2021-11-23 13:55:50,229 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2021-11-23 13:55:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2021-11-23 13:55:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2021-11-23 13:55:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:55:50,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:50,232 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] [2021-11-23 13:55:50,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:55:50,232 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2014631486, now seen corresponding path program 1 times [2021-11-23 13:55:50,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:50,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074800679] [2021-11-23 13:55:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:50,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:50,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074800679] [2021-11-23 13:55:50,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074800679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:50,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:50,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:55:50,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603247322] [2021-11-23 13:55:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:50,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:55:50,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:55:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:55:50,365 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:50,635 INFO L93 Difference]: Finished difference Result 1489 states and 2322 transitions. [2021-11-23 13:55:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:55:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-23 13:55:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:50,644 INFO L225 Difference]: With dead ends: 1489 [2021-11-23 13:55:50,644 INFO L226 Difference]: Without dead ends: 1279 [2021-11-23 13:55:50,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:55:50,648 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 423 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:50,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 419 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:55:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-11-23 13:55:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 437. [2021-11-23 13:55:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.5137614678899083) internal successors, (660), 436 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 660 transitions. [2021-11-23 13:55:50,715 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 660 transitions. Word has length 39 [2021-11-23 13:55:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:50,716 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 660 transitions. [2021-11-23 13:55:50,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 660 transitions. [2021-11-23 13:55:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:55:50,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:50,718 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] [2021-11-23 13:55:50,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:55:50,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:50,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1891215654, now seen corresponding path program 1 times [2021-11-23 13:55:50,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:50,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662975903] [2021-11-23 13:55:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:50,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:50,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662975903] [2021-11-23 13:55:50,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662975903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:50,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:50,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:55:50,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185156408] [2021-11-23 13:55:50,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:50,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:55:50,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:55:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:50,793 INFO L87 Difference]: Start difference. First operand 437 states and 660 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:50,860 INFO L93 Difference]: Finished difference Result 1055 states and 1604 transitions. [2021-11-23 13:55:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:55:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-23 13:55:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:50,867 INFO L225 Difference]: With dead ends: 1055 [2021-11-23 13:55:50,867 INFO L226 Difference]: Without dead ends: 637 [2021-11-23 13:55:50,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:55:50,882 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:50,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 154 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-23 13:55:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-11-23 13:55:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.498422712933754) internal successors, (950), 634 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 950 transitions. [2021-11-23 13:55:50,958 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 950 transitions. Word has length 41 [2021-11-23 13:55:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:50,960 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 950 transitions. [2021-11-23 13:55:50,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 950 transitions. [2021-11-23 13:55:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:55:50,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:50,971 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] [2021-11-23 13:55:50,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:55:50,973 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1870212999, now seen corresponding path program 1 times [2021-11-23 13:55:50,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:50,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690495425] [2021-11-23 13:55:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:50,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:51,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:51,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690495425] [2021-11-23 13:55:51,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690495425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:51,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:51,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:55:51,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222882774] [2021-11-23 13:55:51,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:51,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:55:51,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:55:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:55:51,217 INFO L87 Difference]: Start difference. First operand 635 states and 950 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:51,325 INFO L93 Difference]: Finished difference Result 1251 states and 1880 transitions. [2021-11-23 13:55:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:55:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-23 13:55:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:51,330 INFO L225 Difference]: With dead ends: 1251 [2021-11-23 13:55:51,331 INFO L226 Difference]: Without dead ends: 637 [2021-11-23 13:55:51,332 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 13:55:51,335 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 171 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:51,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 195 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-23 13:55:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2021-11-23 13:55:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.4794952681388012) internal successors, (938), 634 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 938 transitions. [2021-11-23 13:55:51,388 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 938 transitions. Word has length 41 [2021-11-23 13:55:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:51,390 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 938 transitions. [2021-11-23 13:55:51,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 938 transitions. [2021-11-23 13:55:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 13:55:51,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:51,392 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] [2021-11-23 13:55:51,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:55:51,393 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2143937547, now seen corresponding path program 1 times [2021-11-23 13:55:51,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:51,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149627176] [2021-11-23 13:55:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:51,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:51,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149627176] [2021-11-23 13:55:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149627176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:51,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:51,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:55:51,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863553497] [2021-11-23 13:55:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:51,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:55:51,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:55:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:55:51,500 INFO L87 Difference]: Start difference. First operand 635 states and 938 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:51,622 INFO L93 Difference]: Finished difference Result 1249 states and 1855 transitions. [2021-11-23 13:55:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:55:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-23 13:55:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:51,643 INFO L225 Difference]: With dead ends: 1249 [2021-11-23 13:55:51,644 INFO L226 Difference]: Without dead ends: 635 [2021-11-23 13:55:51,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:55:51,650 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 198 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:51,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-23 13:55:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-23 13:55:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.4605678233438486) internal successors, (926), 634 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 926 transitions. [2021-11-23 13:55:51,716 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 926 transitions. Word has length 42 [2021-11-23 13:55:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:51,717 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 926 transitions. [2021-11-23 13:55:51,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 926 transitions. [2021-11-23 13:55:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 13:55:51,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:51,722 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] [2021-11-23 13:55:51,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:55:51,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:51,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2021-11-23 13:55:51,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:51,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664066117] [2021-11-23 13:55:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:51,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:51,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:51,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664066117] [2021-11-23 13:55:51,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664066117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:51,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:51,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:55:51,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858151765] [2021-11-23 13:55:51,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:51,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:55:51,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:55:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:55:51,828 INFO L87 Difference]: Start difference. First operand 635 states and 926 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:51,986 INFO L93 Difference]: Finished difference Result 1143 states and 1658 transitions. [2021-11-23 13:55:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:55:51,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-23 13:55:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:51,997 INFO L225 Difference]: With dead ends: 1143 [2021-11-23 13:55:51,998 INFO L226 Difference]: Without dead ends: 1141 [2021-11-23 13:55:51,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:55:52,000 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 108 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 361 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 13:55:52,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 361 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-11-23 13:55:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 667. [2021-11-23 13:55:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 1.4324324324324325) internal successors, (954), 666 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 954 transitions. [2021-11-23 13:55:52,107 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 954 transitions. Word has length 42 [2021-11-23 13:55:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:52,113 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 954 transitions. [2021-11-23 13:55:52,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 954 transitions. [2021-11-23 13:55:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 13:55:52,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:52,119 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:55:52,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:55:52,119 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2021-11-23 13:55:52,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:52,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39599785] [2021-11-23 13:55:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:52,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:55:52,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39599785] [2021-11-23 13:55:52,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39599785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:52,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:52,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:55:52,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40840528] [2021-11-23 13:55:52,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:52,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:55:52,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:55:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:55:52,243 INFO L87 Difference]: Start difference. First operand 667 states and 954 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:52,516 INFO L93 Difference]: Finished difference Result 2735 states and 3928 transitions. [2021-11-23 13:55:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:55:52,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 60 [2021-11-23 13:55:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:52,530 INFO L225 Difference]: With dead ends: 2735 [2021-11-23 13:55:52,530 INFO L226 Difference]: Without dead ends: 2089 [2021-11-23 13:55:52,532 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 13:55:52,535 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 214 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:52,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 325 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-11-23 13:55:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1311. [2021-11-23 13:55:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 1.4305343511450381) internal successors, (1874), 1310 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1874 transitions. [2021-11-23 13:55:52,694 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1874 transitions. Word has length 60 [2021-11-23 13:55:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:52,694 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1874 transitions. [2021-11-23 13:55:52,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1874 transitions. [2021-11-23 13:55:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 13:55:52,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:52,696 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:55:52,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:55:52,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1524898995, now seen corresponding path program 1 times [2021-11-23 13:55:52,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:52,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032526016] [2021-11-23 13:55:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:52,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:55:52,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:52,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032526016] [2021-11-23 13:55:52,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032526016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:52,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:52,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:55:52,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824422648] [2021-11-23 13:55:52,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:52,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:55:52,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:55:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:55:52,791 INFO L87 Difference]: Start difference. First operand 1311 states and 1874 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:53,221 INFO L93 Difference]: Finished difference Result 3379 states and 4848 transitions. [2021-11-23 13:55:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:55:53,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 60 [2021-11-23 13:55:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:53,237 INFO L225 Difference]: With dead ends: 3379 [2021-11-23 13:55:53,237 INFO L226 Difference]: Without dead ends: 2733 [2021-11-23 13:55:53,239 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 13:55:53,240 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 209 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:53,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 355 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-11-23 13:55:53,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2279. [2021-11-23 13:55:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.4240561896400352) internal successors, (3244), 2278 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3244 transitions. [2021-11-23 13:55:53,498 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3244 transitions. Word has length 60 [2021-11-23 13:55:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:53,498 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 3244 transitions. [2021-11-23 13:55:53,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3244 transitions. [2021-11-23 13:55:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 13:55:53,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:53,500 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:55:53,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:55:53,501 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2021-11-23 13:55:53,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:53,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654102705] [2021-11-23 13:55:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:53,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:55:53,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:53,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654102705] [2021-11-23 13:55:53,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654102705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:55:53,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:55:53,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:55:53,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208572910] [2021-11-23 13:55:53,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:55:53,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:55:53,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:55:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:55:53,565 INFO L87 Difference]: Start difference. First operand 2279 states and 3244 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:55:53,909 INFO L93 Difference]: Finished difference Result 3631 states and 5216 transitions. [2021-11-23 13:55:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:55:53,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 60 [2021-11-23 13:55:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:55:53,928 INFO L225 Difference]: With dead ends: 3631 [2021-11-23 13:55:53,928 INFO L226 Difference]: Without dead ends: 3181 [2021-11-23 13:55:53,930 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 13:55:53,931 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 206 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:55:53,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 338 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:55:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-11-23 13:55:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2727. [2021-11-23 13:55:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4277329420396185) internal successors, (3892), 2726 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3892 transitions. [2021-11-23 13:55:54,197 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3892 transitions. Word has length 60 [2021-11-23 13:55:54,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:55:54,197 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3892 transitions. [2021-11-23 13:55:54,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3892 transitions. [2021-11-23 13:55:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 13:55:54,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:55:54,199 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] [2021-11-23 13:55:54,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:55:54,200 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:55:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:55:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1791952020, now seen corresponding path program 1 times [2021-11-23 13:55:54,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:55:54,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330482836] [2021-11-23 13:55:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:54,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:55:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:55:54,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:55:54,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330482836] [2021-11-23 13:55:54,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330482836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:55:54,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615750651] [2021-11-23 13:55:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:55:54,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:55:54,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:55:54,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:55:54,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:55:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:55:54,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:55:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:55:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:55:54,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:55:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:55:55,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615750651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:55:55,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:55:55,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2021-11-23 13:55:55,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036623979] [2021-11-23 13:55:55,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:55:55,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 13:55:55,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 13:55:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:55:55,226 INFO L87 Difference]: Start difference. First operand 2727 states and 3892 transitions. Second operand has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:01,810 INFO L93 Difference]: Finished difference Result 29898 states and 42051 transitions. [2021-11-23 13:56:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-23 13:56:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 13:56:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:01,937 INFO L225 Difference]: With dead ends: 29898 [2021-11-23 13:56:01,938 INFO L226 Difference]: Without dead ends: 27192 [2021-11-23 13:56:01,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3958 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1709, Invalid=8391, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 13:56:01,953 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 3693 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3693 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:01,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3693 Valid, 932 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 13:56:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27192 states. [2021-11-23 13:56:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27192 to 12883. [2021-11-23 13:56:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12883 states, 12882 states have (on average 1.3861201676758268) internal successors, (17856), 12882 states have internal predecessors, (17856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12883 states to 12883 states and 17856 transitions. [2021-11-23 13:56:03,542 INFO L78 Accepts]: Start accepts. Automaton has 12883 states and 17856 transitions. Word has length 61 [2021-11-23 13:56:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:03,542 INFO L470 AbstractCegarLoop]: Abstraction has 12883 states and 17856 transitions. [2021-11-23 13:56:03,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 12883 states and 17856 transitions. [2021-11-23 13:56:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 13:56:03,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:03,544 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 13:56:03,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:03,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 13:56:03,760 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 653717303, now seen corresponding path program 1 times [2021-11-23 13:56:03,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:03,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393225784] [2021-11-23 13:56:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:03,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:03,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:03,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393225784] [2021-11-23 13:56:03,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393225784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:56:03,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313441959] [2021-11-23 13:56:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:03,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:03,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:03,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:56:03,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90e3168f-60c1-4e23-9138-eeb49b8eae30/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:56:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 13:56:04,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:07,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:56:09,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313441959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:56:09,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:56:09,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 16] total 40 [2021-11-23 13:56:09,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444607607] [2021-11-23 13:56:09,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:56:09,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 13:56:09,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 13:56:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 13:56:09,985 INFO L87 Difference]: Start difference. First operand 12883 states and 17856 transitions. Second operand has 40 states, 40 states have (on average 4.175) internal successors, (167), 40 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)