./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/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_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/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_946a93c0-e7e6-44aa-95a4-bb369530139d/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 ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:29:28,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:29:28,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:29:28,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:29:28,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:29:28,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:29:28,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:29:28,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:29:28,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:29:28,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:29:28,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:29:28,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:29:28,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:29:28,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:29:28,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:29:28,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:29:28,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:29:28,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:29:28,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:29:28,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:29:28,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:29:28,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:29:28,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:29:28,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:29:28,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:29:28,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:29:28,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:29:28,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:29:28,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:29:28,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:29:28,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:29:28,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:29:28,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:29:28,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:29:28,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:29:28,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:29:28,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:29:28,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:29:28,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:29:28,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:29:28,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:29:28,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:29:28,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:29:28,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:29:28,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:29:28,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:29:28,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:29:28,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:29:28,655 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:29:28,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:29:28,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:29:28,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:29:28,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:29:28,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:29:28,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:29:28,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:29:28,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:29:28,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:29:28,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:29:28,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:29:28,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:29:28,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:29:28,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:29:28,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:29:28,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:29:28,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:29:28,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:29:28,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:29:28,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:29:28,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:29:28,661 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:29:28,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:29:28,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:29:28,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:29:28,663 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_946a93c0-e7e6-44aa-95a4-bb369530139d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 [2021-11-23 12:29:29,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:29:29,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:29:29,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:29:29,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:29:29,035 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:29:29,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-11-23 12:29:29,117 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/data/d1bc6df44/38f8afdcc478488db75d3a9ce3f8851a/FLAG27511cef2 [2021-11-23 12:29:29,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:29:29,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-11-23 12:29:29,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/data/d1bc6df44/38f8afdcc478488db75d3a9ce3f8851a/FLAG27511cef2 [2021-11-23 12:29:29,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/data/d1bc6df44/38f8afdcc478488db75d3a9ce3f8851a [2021-11-23 12:29:29,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:29:29,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:29:29,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:29:29,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:29:29,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:29:29,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:29:29" (1/1) ... [2021-11-23 12:29:29,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd25851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:29, skipping insertion in model container [2021-11-23 12:29:29,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:29:29" (1/1) ... [2021-11-23 12:29:30,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:29:30,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:29:30,319 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_946a93c0-e7e6-44aa-95a4-bb369530139d/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2021-11-23 12:29:30,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:29:30,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:29:30,394 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_946a93c0-e7e6-44aa-95a4-bb369530139d/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2021-11-23 12:29:30,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:29:30,412 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:29:30,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30 WrapperNode [2021-11-23 12:29:30,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:29:30,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:29:30,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:29:30,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:29:30,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,500 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 382 [2021-11-23 12:29:30,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:29:30,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:29:30,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:29:30,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:29:30,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:29:30,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:29:30,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:29:30,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:29:30,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (1/1) ... [2021-11-23 12:29:30,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:29:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:29:30,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:29:30,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946a93c0-e7e6-44aa-95a4-bb369530139d/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:29:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:29:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:29:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:29:30,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:29:30,849 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:29:30,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:29:31,333 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:29:31,343 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:29:31,344 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:29:31,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:29:31 BoogieIcfgContainer [2021-11-23 12:29:31,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:29:31,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:29:31,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:29:31,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:29:31,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:29:29" (1/3) ... [2021-11-23 12:29:31,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66db6683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:29:31, skipping insertion in model container [2021-11-23 12:29:31,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:29:30" (2/3) ... [2021-11-23 12:29:31,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66db6683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:29:31, skipping insertion in model container [2021-11-23 12:29:31,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:29:31" (3/3) ... [2021-11-23 12:29:31,355 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-11-23 12:29:31,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:29:31,361 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:29:31,416 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:29:31,424 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 12:29:31,424 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:29:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.7058823529411764) internal successors, (203), 120 states have internal predecessors, (203), 0 states have call successors, (0), 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 12:29:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 12:29:31,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:31,456 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] [2021-11-23 12:29:31,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:31,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1732857806, now seen corresponding path program 1 times [2021-11-23 12:29:31,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:31,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47336579] [2021-11-23 12:29:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:31,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:31,721 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 12:29:31,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:31,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47336579] [2021-11-23 12:29:31,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47336579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:31,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:31,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:29:31,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543663730] [2021-11-23 12:29:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:31,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:29:31,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:29:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:29:31,775 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.7058823529411764) internal successors, (203), 120 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 12:29:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:31,831 INFO L93 Difference]: Finished difference Result 201 states and 333 transitions. [2021-11-23 12:29:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:29:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-23 12:29:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:31,849 INFO L225 Difference]: With dead ends: 201 [2021-11-23 12:29:31,849 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 12:29:31,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:29:31,856 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:31,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 12:29:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-23 12:29:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 116 states have internal predecessors, (196), 0 states have call successors, (0), 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 12:29:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 196 transitions. [2021-11-23 12:29:31,917 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 196 transitions. Word has length 33 [2021-11-23 12:29:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:31,917 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 196 transitions. [2021-11-23 12:29:31,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 12:29:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 196 transitions. [2021-11-23 12:29:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 12:29:31,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:31,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:29:31,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2052636400, now seen corresponding path program 1 times [2021-11-23 12:29:31,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:31,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996493920] [2021-11-23 12:29:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:31,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:32,110 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 12:29:32,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:32,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996493920] [2021-11-23 12:29:32,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996493920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:32,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:32,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:29:32,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123463631] [2021-11-23 12:29:32,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:32,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:29:32,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:29:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:29:32,117 INFO L87 Difference]: Start difference. First operand 117 states and 196 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 12:29:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:32,243 INFO L93 Difference]: Finished difference Result 200 states and 326 transitions. [2021-11-23 12:29:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:29:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-23 12:29:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:32,246 INFO L225 Difference]: With dead ends: 200 [2021-11-23 12:29:32,246 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 12:29:32,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:32,249 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 3 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:32,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 741 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 12:29:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-23 12:29:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4137931034482758) internal successors, (164), 116 states have internal predecessors, (164), 0 states have call successors, (0), 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 12:29:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2021-11-23 12:29:32,260 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 33 [2021-11-23 12:29:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:32,261 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2021-11-23 12:29:32,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 12:29:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2021-11-23 12:29:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 12:29:32,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:32,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:32,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:29:32,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 148306117, now seen corresponding path program 1 times [2021-11-23 12:29:32,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422293664] [2021-11-23 12:29:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:32,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:32,376 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 12:29:32,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:32,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422293664] [2021-11-23 12:29:32,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422293664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:32,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:32,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:32,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389333975] [2021-11-23 12:29:32,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:32,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:32,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:32,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:32,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:32,381 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:32,417 INFO L93 Difference]: Finished difference Result 263 states and 396 transitions. [2021-11-23 12:29:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 12:29:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:32,424 INFO L225 Difference]: With dead ends: 263 [2021-11-23 12:29:32,425 INFO L226 Difference]: Without dead ends: 184 [2021-11-23 12:29:32,425 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 12:29:32,433 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 110 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 366 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 12:29:32,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 366 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-23 12:29:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-11-23 12:29:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.4806629834254144) internal successors, (268), 181 states have internal predecessors, (268), 0 states have call successors, (0), 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 12:29:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 268 transitions. [2021-11-23 12:29:32,465 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 268 transitions. Word has length 64 [2021-11-23 12:29:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:32,466 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 268 transitions. [2021-11-23 12:29:32,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 268 transitions. [2021-11-23 12:29:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 12:29:32,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:32,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:32,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:29:32,469 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1747202786, now seen corresponding path program 1 times [2021-11-23 12:29:32,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:32,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590948995] [2021-11-23 12:29:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:32,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:32,622 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 12:29:32,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590948995] [2021-11-23 12:29:32,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590948995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:32,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:32,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:32,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618325787] [2021-11-23 12:29:32,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:32,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:32,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:32,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:32,627 INFO L87 Difference]: Start difference. First operand 182 states and 268 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:32,669 INFO L93 Difference]: Finished difference Result 446 states and 688 transitions. [2021-11-23 12:29:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 12:29:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:32,673 INFO L225 Difference]: With dead ends: 446 [2021-11-23 12:29:32,673 INFO L226 Difference]: Without dead ends: 302 [2021-11-23 12:29:32,679 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 12:29:32,688 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 105 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 357 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 12:29:32,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 357 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:32,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-23 12:29:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-11-23 12:29:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.5217391304347827) internal successors, (455), 299 states have internal predecessors, (455), 0 states have call successors, (0), 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 12:29:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 455 transitions. [2021-11-23 12:29:32,734 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 455 transitions. Word has length 65 [2021-11-23 12:29:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:32,735 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 455 transitions. [2021-11-23 12:29:32,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 455 transitions. [2021-11-23 12:29:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 12:29:32,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:32,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:32,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:29:32,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash 378408053, now seen corresponding path program 1 times [2021-11-23 12:29:32,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743553394] [2021-11-23 12:29:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:32,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:32,799 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 12:29:32,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:32,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743553394] [2021-11-23 12:29:32,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743553394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:32,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:32,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:32,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082110839] [2021-11-23 12:29:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:32,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:32,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:32,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:32,802 INFO L87 Difference]: Start difference. First operand 300 states and 455 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:32,854 INFO L93 Difference]: Finished difference Result 776 states and 1209 transitions. [2021-11-23 12:29:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:32,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 12:29:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:32,859 INFO L225 Difference]: With dead ends: 776 [2021-11-23 12:29:32,860 INFO L226 Difference]: Without dead ends: 514 [2021-11-23 12:29:32,861 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 12:29:32,863 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 100 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 348 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 12:29:32,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 348 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-23 12:29:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2021-11-23 12:29:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.5401174168297456) internal successors, (787), 511 states have internal predecessors, (787), 0 states have call successors, (0), 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 12:29:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 787 transitions. [2021-11-23 12:29:32,910 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 787 transitions. Word has length 66 [2021-11-23 12:29:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:32,910 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 787 transitions. [2021-11-23 12:29:32,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 787 transitions. [2021-11-23 12:29:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 12:29:32,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:32,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:32,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:29:32,919 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:32,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1350891378, now seen corresponding path program 1 times [2021-11-23 12:29:32,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:32,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783073681] [2021-11-23 12:29:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:32,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:33,012 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 12:29:33,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:33,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783073681] [2021-11-23 12:29:33,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783073681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:33,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:33,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:33,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318811011] [2021-11-23 12:29:33,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:33,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:33,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:33,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:33,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:33,016 INFO L87 Difference]: Start difference. First operand 512 states and 787 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:33,074 INFO L93 Difference]: Finished difference Result 1364 states and 2125 transitions. [2021-11-23 12:29:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 12:29:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:33,086 INFO L225 Difference]: With dead ends: 1364 [2021-11-23 12:29:33,086 INFO L226 Difference]: Without dead ends: 890 [2021-11-23 12:29:33,088 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 12:29:33,091 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 95 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 339 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 12:29:33,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 339 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-23 12:29:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2021-11-23 12:29:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.5411499436302143) internal successors, (1367), 887 states have internal predecessors, (1367), 0 states have call successors, (0), 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 12:29:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1367 transitions. [2021-11-23 12:29:33,134 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1367 transitions. Word has length 67 [2021-11-23 12:29:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:33,134 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1367 transitions. [2021-11-23 12:29:33,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1367 transitions. [2021-11-23 12:29:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 12:29:33,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:33,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:33,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:29:33,136 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash 644065317, now seen corresponding path program 1 times [2021-11-23 12:29:33,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:33,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122438426] [2021-11-23 12:29:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:33,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:33,228 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 12:29:33,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122438426] [2021-11-23 12:29:33,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122438426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:33,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:33,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:29:33,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621343097] [2021-11-23 12:29:33,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:33,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:29:33,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:29:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:33,239 INFO L87 Difference]: Start difference. First operand 888 states and 1367 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 12:29:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:33,511 INFO L93 Difference]: Finished difference Result 5988 states and 9341 transitions. [2021-11-23 12:29:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:29:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 12:29:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:33,542 INFO L225 Difference]: With dead ends: 5988 [2021-11-23 12:29:33,543 INFO L226 Difference]: Without dead ends: 5138 [2021-11-23 12:29:33,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:29:33,547 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1193 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:33,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1816 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5138 states. [2021-11-23 12:29:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5138 to 1736. [2021-11-23 12:29:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 1.534870317002882) internal successors, (2663), 1735 states have internal predecessors, (2663), 0 states have call successors, (0), 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 12:29:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2663 transitions. [2021-11-23 12:29:33,697 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2663 transitions. Word has length 68 [2021-11-23 12:29:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:33,697 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 2663 transitions. [2021-11-23 12:29:33,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 12:29:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2663 transitions. [2021-11-23 12:29:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 12:29:33,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:33,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:33,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:29:33,699 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1892134872, now seen corresponding path program 1 times [2021-11-23 12:29:33,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:33,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893843190] [2021-11-23 12:29:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:33,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:33,825 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 12:29:33,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:33,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893843190] [2021-11-23 12:29:33,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893843190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:33,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:33,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:29:33,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518556028] [2021-11-23 12:29:33,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:33,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:29:33,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:29:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:33,828 INFO L87 Difference]: Start difference. First operand 1736 states and 2663 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:34,325 INFO L93 Difference]: Finished difference Result 9394 states and 14348 transitions. [2021-11-23 12:29:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:29:34,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 12:29:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:34,400 INFO L225 Difference]: With dead ends: 9394 [2021-11-23 12:29:34,401 INFO L226 Difference]: Without dead ends: 7696 [2021-11-23 12:29:34,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:34,405 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 670 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:34,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 775 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7696 states. [2021-11-23 12:29:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7696 to 7688. [2021-11-23 12:29:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 1.5203590477429427) internal successors, (11687), 7687 states have internal predecessors, (11687), 0 states have call successors, (0), 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 12:29:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 11687 transitions. [2021-11-23 12:29:34,862 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 11687 transitions. Word has length 69 [2021-11-23 12:29:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:34,863 INFO L470 AbstractCegarLoop]: Abstraction has 7688 states and 11687 transitions. [2021-11-23 12:29:34,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 11687 transitions. [2021-11-23 12:29:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 12:29:34,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:34,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:34,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:29:34,865 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:34,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1491011308, now seen corresponding path program 1 times [2021-11-23 12:29:34,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:34,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281384359] [2021-11-23 12:29:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:34,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:34,987 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 12:29:34,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:34,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281384359] [2021-11-23 12:29:34,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281384359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:34,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:34,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:29:34,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378379141] [2021-11-23 12:29:34,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:34,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:29:34,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:29:34,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:29:34,991 INFO L87 Difference]: Start difference. First operand 7688 states and 11687 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:35,696 INFO L93 Difference]: Finished difference Result 15978 states and 23976 transitions. [2021-11-23 12:29:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:29:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 12:29:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:35,792 INFO L225 Difference]: With dead ends: 15978 [2021-11-23 12:29:35,792 INFO L226 Difference]: Without dead ends: 15976 [2021-11-23 12:29:35,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:29:35,797 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 357 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:35,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 729 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15976 states. [2021-11-23 12:29:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15976 to 8168. [2021-11-23 12:29:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8167 states have (on average 1.4897759275131628) internal successors, (12167), 8167 states have internal predecessors, (12167), 0 states have call successors, (0), 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 12:29:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 12167 transitions. [2021-11-23 12:29:36,464 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 12167 transitions. Word has length 70 [2021-11-23 12:29:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:36,465 INFO L470 AbstractCegarLoop]: Abstraction has 8168 states and 12167 transitions. [2021-11-23 12:29:36,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 12167 transitions. [2021-11-23 12:29:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 12:29:36,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:36,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:36,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:29:36,470 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1075868401, now seen corresponding path program 1 times [2021-11-23 12:29:36,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:36,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238066852] [2021-11-23 12:29:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:36,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:36,549 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 12:29:36,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:36,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238066852] [2021-11-23 12:29:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238066852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:36,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:36,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:36,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921132748] [2021-11-23 12:29:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:36,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:36,552 INFO L87 Difference]: Start difference. First operand 8168 states and 12167 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:37,301 INFO L93 Difference]: Finished difference Result 22556 states and 33449 transitions. [2021-11-23 12:29:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:37,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 12:29:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:37,338 INFO L225 Difference]: With dead ends: 22556 [2021-11-23 12:29:37,338 INFO L226 Difference]: Without dead ends: 14426 [2021-11-23 12:29:37,349 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 12:29:37,350 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 85 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 285 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 12:29:37,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 285 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14426 states. [2021-11-23 12:29:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14426 to 14280. [2021-11-23 12:29:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14280 states, 14279 states have (on average 1.462777505427551) internal successors, (20887), 14279 states have internal predecessors, (20887), 0 states have call successors, (0), 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 12:29:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14280 states to 14280 states and 20887 transitions. [2021-11-23 12:29:38,269 INFO L78 Accepts]: Start accepts. Automaton has 14280 states and 20887 transitions. Word has length 71 [2021-11-23 12:29:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 14280 states and 20887 transitions. [2021-11-23 12:29:38,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 14280 states and 20887 transitions. [2021-11-23 12:29:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 12:29:38,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:38,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:38,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:29:38,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1119250846, now seen corresponding path program 1 times [2021-11-23 12:29:38,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:38,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854261146] [2021-11-23 12:29:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:38,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:38,318 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 12:29:38,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:38,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854261146] [2021-11-23 12:29:38,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854261146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:38,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:38,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:38,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716722457] [2021-11-23 12:29:38,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:38,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:38,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:38,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:38,322 INFO L87 Difference]: Start difference. First operand 14280 states and 20887 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:39,175 INFO L93 Difference]: Finished difference Result 28783 states and 42269 transitions. [2021-11-23 12:29:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:39,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 12:29:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:39,229 INFO L225 Difference]: With dead ends: 28783 [2021-11-23 12:29:39,229 INFO L226 Difference]: Without dead ends: 20652 [2021-11-23 12:29:39,242 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 12:29:39,243 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 111 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 387 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 12:29:39,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 387 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20652 states. [2021-11-23 12:29:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20652 to 20650. [2021-11-23 12:29:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20650 states, 20649 states have (on average 1.4517410044069932) internal successors, (29977), 20649 states have internal predecessors, (29977), 0 states have call successors, (0), 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 12:29:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29977 transitions. [2021-11-23 12:29:40,395 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29977 transitions. Word has length 72 [2021-11-23 12:29:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:40,395 INFO L470 AbstractCegarLoop]: Abstraction has 20650 states and 29977 transitions. [2021-11-23 12:29:40,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29977 transitions. [2021-11-23 12:29:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 12:29:40,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:40,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:40,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:29:40,408 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1256319803, now seen corresponding path program 1 times [2021-11-23 12:29:40,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575784114] [2021-11-23 12:29:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:40,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:40,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:40,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575784114] [2021-11-23 12:29:40,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575784114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:40,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:40,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:40,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645516663] [2021-11-23 12:29:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:40,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:40,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:40,456 INFO L87 Difference]: Start difference. First operand 20650 states and 29977 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:29:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:41,614 INFO L93 Difference]: Finished difference Result 51965 states and 75309 transitions. [2021-11-23 12:29:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-23 12:29:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:41,679 INFO L225 Difference]: With dead ends: 51965 [2021-11-23 12:29:41,679 INFO L226 Difference]: Without dead ends: 34683 [2021-11-23 12:29:41,708 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 12:29:41,709 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:41,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 325 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34683 states. [2021-11-23 12:29:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34683 to 33297. [2021-11-23 12:29:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33297 states, 33296 states have (on average 1.4366590581451226) internal successors, (47835), 33296 states have internal predecessors, (47835), 0 states have call successors, (0), 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 12:29:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33297 states to 33297 states and 47835 transitions. [2021-11-23 12:29:43,247 INFO L78 Accepts]: Start accepts. Automaton has 33297 states and 47835 transitions. Word has length 99 [2021-11-23 12:29:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:43,248 INFO L470 AbstractCegarLoop]: Abstraction has 33297 states and 47835 transitions. [2021-11-23 12:29:43,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:29:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33297 states and 47835 transitions. [2021-11-23 12:29:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 12:29:43,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:43,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:43,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:29:43,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1278390955, now seen corresponding path program 1 times [2021-11-23 12:29:43,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:43,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128449220] [2021-11-23 12:29:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:43,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 12:29:43,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128449220] [2021-11-23 12:29:43,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128449220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:43,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:43,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:29:43,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141486980] [2021-11-23 12:29:43,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:43,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:29:43,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:29:43,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:43,368 INFO L87 Difference]: Start difference. First operand 33297 states and 47835 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:45,462 INFO L93 Difference]: Finished difference Result 82133 states and 119169 transitions. [2021-11-23 12:29:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:29:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 12:29:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:45,572 INFO L225 Difference]: With dead ends: 82133 [2021-11-23 12:29:45,572 INFO L226 Difference]: Without dead ends: 69243 [2021-11-23 12:29:45,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:29:45,600 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1071 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:45,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 1209 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:29:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69243 states. [2021-11-23 12:29:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69243 to 45897. [2021-11-23 12:29:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45897 states, 45896 states have (on average 1.4365304165940387) internal successors, (65931), 45896 states have internal predecessors, (65931), 0 states have call successors, (0), 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 12:29:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45897 states to 45897 states and 65931 transitions. [2021-11-23 12:29:47,894 INFO L78 Accepts]: Start accepts. Automaton has 45897 states and 65931 transitions. Word has length 99 [2021-11-23 12:29:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:47,895 INFO L470 AbstractCegarLoop]: Abstraction has 45897 states and 65931 transitions. [2021-11-23 12:29:47,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:29:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 45897 states and 65931 transitions. [2021-11-23 12:29:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 12:29:47,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:47,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:47,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:29:47,923 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1536118245, now seen corresponding path program 1 times [2021-11-23 12:29:47,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:47,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143214214] [2021-11-23 12:29:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:47,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:47,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143214214] [2021-11-23 12:29:47,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143214214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:47,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:47,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:47,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698210019] [2021-11-23 12:29:47,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:47,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:47,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:47,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:47,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:47,981 INFO L87 Difference]: Start difference. First operand 45897 states and 65931 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:29:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:50,520 INFO L93 Difference]: Finished difference Result 91107 states and 130738 transitions. [2021-11-23 12:29:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-23 12:29:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:50,600 INFO L225 Difference]: With dead ends: 91107 [2021-11-23 12:29:50,600 INFO L226 Difference]: Without dead ends: 65137 [2021-11-23 12:29:50,622 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 12:29:50,624 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 87 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:50,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 351 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65137 states. [2021-11-23 12:29:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65137 to 59867. [2021-11-23 12:29:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59867 states, 59866 states have (on average 1.4217084822770856) internal successors, (85112), 59866 states have internal predecessors, (85112), 0 states have call successors, (0), 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 12:29:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59867 states to 59867 states and 85112 transitions. [2021-11-23 12:29:53,303 INFO L78 Accepts]: Start accepts. Automaton has 59867 states and 85112 transitions. Word has length 99 [2021-11-23 12:29:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:53,303 INFO L470 AbstractCegarLoop]: Abstraction has 59867 states and 85112 transitions. [2021-11-23 12:29:53,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:29:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 59867 states and 85112 transitions. [2021-11-23 12:29:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 12:29:53,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:53,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:53,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:29:53,326 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1963464309, now seen corresponding path program 1 times [2021-11-23 12:29:53,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:53,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514765146] [2021-11-23 12:29:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:53,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:29:53,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:53,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514765146] [2021-11-23 12:29:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514765146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:53,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:53,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:29:53,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468423061] [2021-11-23 12:29:53,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:53,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:29:53,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:29:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:29:53,377 INFO L87 Difference]: Start difference. First operand 59867 states and 85112 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:29:56,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:29:56,463 INFO L93 Difference]: Finished difference Result 95012 states and 134424 transitions. [2021-11-23 12:29:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:29:56,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-23 12:29:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:29:56,547 INFO L225 Difference]: With dead ends: 95012 [2021-11-23 12:29:56,547 INFO L226 Difference]: Without dead ends: 63682 [2021-11-23 12:29:56,567 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 12:29:56,568 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 88 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:29:56,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 367 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:29:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63682 states. [2021-11-23 12:29:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63682 to 60732. [2021-11-23 12:29:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60732 states, 60731 states have (on average 1.3985773328283744) internal successors, (84937), 60731 states have internal predecessors, (84937), 0 states have call successors, (0), 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 12:29:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60732 states to 60732 states and 84937 transitions. [2021-11-23 12:29:59,254 INFO L78 Accepts]: Start accepts. Automaton has 60732 states and 84937 transitions. Word has length 99 [2021-11-23 12:29:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:29:59,255 INFO L470 AbstractCegarLoop]: Abstraction has 60732 states and 84937 transitions. [2021-11-23 12:29:59,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:29:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 60732 states and 84937 transitions. [2021-11-23 12:29:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 12:29:59,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:29:59,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:29:59,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:29:59,274 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:29:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:29:59,275 INFO L85 PathProgramCache]: Analyzing trace with hash 429145653, now seen corresponding path program 1 times [2021-11-23 12:29:59,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:29:59,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889349892] [2021-11-23 12:29:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:29:59,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:29:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:29:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 12:29:59,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:29:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889349892] [2021-11-23 12:29:59,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889349892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:29:59,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:29:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:29:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141914805] [2021-11-23 12:29:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:29:59,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:29:59,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:29:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:29:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:29:59,373 INFO L87 Difference]: Start difference. First operand 60732 states and 84937 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:03,522 INFO L93 Difference]: Finished difference Result 117878 states and 166778 transitions. [2021-11-23 12:30:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:30:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 12:30:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:03,685 INFO L225 Difference]: With dead ends: 117878 [2021-11-23 12:30:03,685 INFO L226 Difference]: Without dead ends: 109236 [2021-11-23 12:30:03,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:30:03,712 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 1158 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:03,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 1153 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:30:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109236 states. [2021-11-23 12:30:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109236 to 69180. [2021-11-23 12:30:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69180 states, 69179 states have (on average 1.4003237976842684) internal successors, (96873), 69179 states have internal predecessors, (96873), 0 states have call successors, (0), 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 12:30:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69180 states to 69180 states and 96873 transitions. [2021-11-23 12:30:06,909 INFO L78 Accepts]: Start accepts. Automaton has 69180 states and 96873 transitions. Word has length 99 [2021-11-23 12:30:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:06,910 INFO L470 AbstractCegarLoop]: Abstraction has 69180 states and 96873 transitions. [2021-11-23 12:30:06,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 69180 states and 96873 transitions. [2021-11-23 12:30:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 12:30:06,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:06,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:06,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:30:06,928 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:06,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2036705921, now seen corresponding path program 1 times [2021-11-23 12:30:06,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:06,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695923514] [2021-11-23 12:30:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:06,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:30:07,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:07,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695923514] [2021-11-23 12:30:07,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695923514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:07,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:30:07,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:30:07,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643245576] [2021-11-23 12:30:07,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:07,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:30:07,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:30:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:30:07,011 INFO L87 Difference]: Start difference. First operand 69180 states and 96873 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:30:11,168 INFO L93 Difference]: Finished difference Result 130553 states and 184762 transitions. [2021-11-23 12:30:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:30:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 12:30:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:30:11,338 INFO L225 Difference]: With dead ends: 130553 [2021-11-23 12:30:11,339 INFO L226 Difference]: Without dead ends: 117577 [2021-11-23 12:30:11,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:30:11,364 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 1064 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:30:11,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 1227 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:30:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117577 states. [2021-11-23 12:30:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117577 to 81828. [2021-11-23 12:30:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81828 states, 81827 states have (on average 1.4018966844684517) internal successors, (114713), 81827 states have internal predecessors, (114713), 0 states have call successors, (0), 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 12:30:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81828 states to 81828 states and 114713 transitions. [2021-11-23 12:30:15,295 INFO L78 Accepts]: Start accepts. Automaton has 81828 states and 114713 transitions. Word has length 99 [2021-11-23 12:30:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:30:15,295 INFO L470 AbstractCegarLoop]: Abstraction has 81828 states and 114713 transitions. [2021-11-23 12:30:15,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:30:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 81828 states and 114713 transitions. [2021-11-23 12:30:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 12:30:15,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:30:15,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:30:15,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:30:15,315 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:30:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:30:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1198363617, now seen corresponding path program 1 times [2021-11-23 12:30:15,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:30:15,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942080369] [2021-11-23 12:30:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:30:15,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:30:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:30:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:30:15,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:30:15,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942080369] [2021-11-23 12:30:15,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942080369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:30:15,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:30:15,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:30:15,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216005033] [2021-11-23 12:30:15,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:30:15,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:30:15,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:30:15,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:30:15,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:30:15,398 INFO L87 Difference]: Start difference. First operand 81828 states and 114713 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)