./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 00976d0f33ca0b9714575e3679f5d33e30ad2cb228857f610050b5b28bb1919c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:27:47,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:27:47,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:27:47,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:27:47,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:27:47,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:27:47,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:27:47,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:27:47,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:27:47,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:27:47,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:27:47,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:27:47,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:27:47,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:27:47,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:27:47,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:27:47,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:27:47,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:27:47,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:27:47,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:27:47,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:27:47,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:27:47,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:27:47,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:27:47,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:27:47,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:27:47,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:27:47,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:27:47,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:27:47,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:27:47,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:27:47,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:27:47,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:27:47,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:27:47,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:27:47,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:27:47,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:27:47,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:27:47,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:27:47,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:27:47,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:27:47,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 20:27:47,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:27:47,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:27:47,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:27:47,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:27:47,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:27:47,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:27:47,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:27:47,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:27:47,633 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:27:47,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:27:47,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:27:47,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 20:27:47,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:27:47,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:27:47,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:27:47,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:27:47,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:27:47,635 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:27:47,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:27:47,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:27:47,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:27:47,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:27:47,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:27:47,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:27:47,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:27:47,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:27:47,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:27:47,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:27:47,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 20:27:47,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 20:27:47,637 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:27:47,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:27:47,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:27:47,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:27:47,638 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00976d0f33ca0b9714575e3679f5d33e30ad2cb228857f610050b5b28bb1919c [2021-12-17 20:27:47,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:27:47,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:27:47,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:27:47,866 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:27:47,866 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:27:47,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2021-12-17 20:27:47,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c26f994/0406fd4e42224463a449fd57ea74a91d/FLAG5d934beb7 [2021-12-17 20:27:48,530 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:27:48,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2021-12-17 20:27:48,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c26f994/0406fd4e42224463a449fd57ea74a91d/FLAG5d934beb7 [2021-12-17 20:27:48,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c26f994/0406fd4e42224463a449fd57ea74a91d [2021-12-17 20:27:48,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:27:48,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:27:48,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:27:48,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:27:48,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:27:48,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:27:48" (1/1) ... [2021-12-17 20:27:48,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b8f0fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:48, skipping insertion in model container [2021-12-17 20:27:48,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:27:48" (1/1) ... [2021-12-17 20:27:48,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:27:49,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:27:49,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[6354,6367] [2021-12-17 20:27:49,315 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[8691,8704] [2021-12-17 20:27:50,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:27:50,055 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:27:50,075 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[6354,6367] [2021-12-17 20:27:50,079 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[8691,8704] [2021-12-17 20:27:50,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:27:50,488 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:27:50,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50 WrapperNode [2021-12-17 20:27:50,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:27:50,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:27:50,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:27:50,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:27:50,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:50,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:50,891 INFO L137 Inliner]: procedures = 33, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4976 [2021-12-17 20:27:50,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:27:50,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:27:50,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:27:50,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:27:50,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:50,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:50,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:50,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:51,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:51,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:51,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:51,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:27:51,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:27:51,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:27:51,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:27:51,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (1/1) ... [2021-12-17 20:27:51,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:27:51,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:27:51,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 20:27:51,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 20:27:51,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:27:51,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 20:27:51,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:27:51,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:27:51,499 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:27:51,500 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:27:54,580 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:27:54,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:27:54,593 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 20:27:54,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:27:54 BoogieIcfgContainer [2021-12-17 20:27:54,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:27:54,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:27:54,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:27:54,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:27:54,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:27:48" (1/3) ... [2021-12-17 20:27:54,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746cabf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:27:54, skipping insertion in model container [2021-12-17 20:27:54,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:27:50" (2/3) ... [2021-12-17 20:27:54,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746cabf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:27:54, skipping insertion in model container [2021-12-17 20:27:54,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:27:54" (3/3) ... [2021-12-17 20:27:54,603 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2021-12-17 20:27:54,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:27:54,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:27:54,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:27:54,654 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 [2021-12-17 20:27:54,654 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:27:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 20:27:54,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:54,686 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] [2021-12-17 20:27:54,686 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1700470853, now seen corresponding path program 1 times [2021-12-17 20:27:54,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:54,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91137891] [2021-12-17 20:27:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:54,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:54,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:54,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91137891] [2021-12-17 20:27:54,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91137891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:54,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:54,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:27:54,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107690433] [2021-12-17 20:27:54,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:54,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:27:54,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:27:54,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:27:54,975 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:58,335 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2021-12-17 20:27:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:27:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-17 20:27:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:58,357 INFO L225 Difference]: With dead ends: 2489 [2021-12-17 20:27:58,357 INFO L226 Difference]: Without dead ends: 1563 [2021-12-17 20:27:58,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:27:58,366 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 975 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 20:27:58,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 255 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 20:27:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-12-17 20:27:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2021-12-17 20:27:58,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.8398462524023063) internal successors, (2872), 1562 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2872 transitions. [2021-12-17 20:27:58,448 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2872 transitions. Word has length 20 [2021-12-17 20:27:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:58,449 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2872 transitions. [2021-12-17 20:27:58,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2872 transitions. [2021-12-17 20:27:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 20:27:58,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:58,450 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] [2021-12-17 20:27:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 20:27:58,451 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-12-17 20:27:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541154153] [2021-12-17 20:27:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:58,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:58,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:58,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541154153] [2021-12-17 20:27:58,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541154153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:58,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:58,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:27:58,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493529020] [2021-12-17 20:27:58,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:58,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:27:58,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:27:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:27:58,513 INFO L87 Difference]: Start difference. First operand 1563 states and 2872 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:58,576 INFO L93 Difference]: Finished difference Result 1639 states and 2988 transitions. [2021-12-17 20:27:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:27:58,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-17 20:27:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:58,584 INFO L225 Difference]: With dead ends: 1639 [2021-12-17 20:27:58,584 INFO L226 Difference]: Without dead ends: 1599 [2021-12-17 20:27:58,585 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 [2021-12-17 20:27:58,586 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:27:58,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-12-17 20:27:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2021-12-17 20:27:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.8295964125560538) internal successors, (2856), 1562 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2856 transitions. [2021-12-17 20:27:58,616 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2856 transitions. Word has length 26 [2021-12-17 20:27:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:58,616 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2856 transitions. [2021-12-17 20:27:58,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2856 transitions. [2021-12-17 20:27:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 20:27:58,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:58,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:27:58,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 20:27:58,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-12-17 20:27:58,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:58,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938902728] [2021-12-17 20:27:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:58,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:58,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938902728] [2021-12-17 20:27:58,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938902728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:58,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:58,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:27:58,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069338661] [2021-12-17 20:27:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:58,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:27:58,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:27:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:27:58,721 INFO L87 Difference]: Start difference. First operand 1563 states and 2856 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:58,748 INFO L93 Difference]: Finished difference Result 1629 states and 2958 transitions. [2021-12-17 20:27:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:27:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-17 20:27:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:58,755 INFO L225 Difference]: With dead ends: 1629 [2021-12-17 20:27:58,756 INFO L226 Difference]: Without dead ends: 1593 [2021-12-17 20:27:58,756 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 [2021-12-17 20:27:58,757 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 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 [2021-12-17 20:27:58,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-12-17 20:27:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2021-12-17 20:27:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1589 states have (on average 1.8250471994965387) internal successors, (2900), 1590 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2900 transitions. [2021-12-17 20:27:58,788 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2900 transitions. Word has length 41 [2021-12-17 20:27:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:58,788 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 2900 transitions. [2021-12-17 20:27:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2900 transitions. [2021-12-17 20:27:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 20:27:58,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:58,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:27:58,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 20:27:58,790 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-12-17 20:27:58,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:58,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919586807] [2021-12-17 20:27:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:58,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:58,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919586807] [2021-12-17 20:27:58,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919586807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:58,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:58,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:27:58,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241376875] [2021-12-17 20:27:58,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:58,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:27:58,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:27:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:27:58,845 INFO L87 Difference]: Start difference. First operand 1591 states and 2900 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:58,938 INFO L93 Difference]: Finished difference Result 1975 states and 3500 transitions. [2021-12-17 20:27:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:27:58,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-17 20:27:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:58,947 INFO L225 Difference]: With dead ends: 1975 [2021-12-17 20:27:58,947 INFO L226 Difference]: Without dead ends: 1911 [2021-12-17 20:27:58,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:27:58,949 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:27:58,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-17 20:27:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2021-12-17 20:27:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1651 states have (on average 1.8140520896426409) internal successors, (2995), 1652 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2995 transitions. [2021-12-17 20:27:58,982 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2995 transitions. Word has length 41 [2021-12-17 20:27:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:58,982 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 2995 transitions. [2021-12-17 20:27:58,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2995 transitions. [2021-12-17 20:27:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 20:27:58,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:58,984 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] [2021-12-17 20:27:58,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 20:27:58,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:58,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:58,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-12-17 20:27:58,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:58,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487581179] [2021-12-17 20:27:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:58,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:59,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:59,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487581179] [2021-12-17 20:27:59,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487581179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:59,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:59,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:27:59,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111468539] [2021-12-17 20:27:59,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:59,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:27:59,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:27:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:27:59,024 INFO L87 Difference]: Start difference. First operand 1653 states and 2995 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:59,057 INFO L93 Difference]: Finished difference Result 1840 states and 3282 transitions. [2021-12-17 20:27:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:27:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-17 20:27:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:59,064 INFO L225 Difference]: With dead ends: 1840 [2021-12-17 20:27:59,064 INFO L226 Difference]: Without dead ends: 1714 [2021-12-17 20:27:59,065 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 [2021-12-17 20:27:59,066 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 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 [2021-12-17 20:27:59,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-17 20:27:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-17 20:27:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.802923976608187) internal successors, (3083), 1711 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3083 transitions. [2021-12-17 20:27:59,103 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3083 transitions. Word has length 43 [2021-12-17 20:27:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:59,104 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 3083 transitions. [2021-12-17 20:27:59,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3083 transitions. [2021-12-17 20:27:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 20:27:59,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:59,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:27:59,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 20:27:59,106 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:59,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-12-17 20:27:59,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:59,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504080064] [2021-12-17 20:27:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:59,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:59,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:59,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504080064] [2021-12-17 20:27:59,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504080064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:59,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:59,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:27:59,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490256801] [2021-12-17 20:27:59,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:27:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:27:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:27:59,212 INFO L87 Difference]: Start difference. First operand 1712 states and 3083 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:59,288 INFO L93 Difference]: Finished difference Result 1897 states and 3365 transitions. [2021-12-17 20:27:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:27:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-17 20:27:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:59,296 INFO L225 Difference]: With dead ends: 1897 [2021-12-17 20:27:59,297 INFO L226 Difference]: Without dead ends: 1714 [2021-12-17 20:27:59,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:27:59,298 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 4476 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:27:59,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 1633 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-17 20:27:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-17 20:27:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.8011695906432748) internal successors, (3080), 1711 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3080 transitions. [2021-12-17 20:27:59,336 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3080 transitions. Word has length 43 [2021-12-17 20:27:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:59,336 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 3080 transitions. [2021-12-17 20:27:59,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3080 transitions. [2021-12-17 20:27:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 20:27:59,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:59,338 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] [2021-12-17 20:27:59,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 20:27:59,338 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-12-17 20:27:59,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:59,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750432549] [2021-12-17 20:27:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:59,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:59,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750432549] [2021-12-17 20:27:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750432549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:59,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:27:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632249359] [2021-12-17 20:27:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:59,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:27:59,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:27:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:27:59,373 INFO L87 Difference]: Start difference. First operand 1712 states and 3080 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:59,411 INFO L93 Difference]: Finished difference Result 2042 states and 3576 transitions. [2021-12-17 20:27:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:27:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-17 20:27:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:59,419 INFO L225 Difference]: With dead ends: 2042 [2021-12-17 20:27:59,420 INFO L226 Difference]: Without dead ends: 1859 [2021-12-17 20:27:59,421 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 [2021-12-17 20:27:59,421 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 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 [2021-12-17 20:27:59,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-12-17 20:27:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2021-12-17 20:27:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1855 states have (on average 1.774123989218329) internal successors, (3291), 1856 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 3291 transitions. [2021-12-17 20:27:59,469 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 3291 transitions. Word has length 43 [2021-12-17 20:27:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:59,470 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 3291 transitions. [2021-12-17 20:27:59,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 3291 transitions. [2021-12-17 20:27:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 20:27:59,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:59,471 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] [2021-12-17 20:27:59,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 20:27:59,471 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:59,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:59,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-12-17 20:27:59,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:59,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029671925] [2021-12-17 20:27:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:59,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:59,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:59,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029671925] [2021-12-17 20:27:59,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029671925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:59,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:59,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:27:59,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245088892] [2021-12-17 20:27:59,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:59,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:27:59,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:27:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:27:59,500 INFO L87 Difference]: Start difference. First operand 1857 states and 3291 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:59,543 INFO L93 Difference]: Finished difference Result 2441 states and 4149 transitions. [2021-12-17 20:27:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:27:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-17 20:27:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:59,552 INFO L225 Difference]: With dead ends: 2441 [2021-12-17 20:27:59,553 INFO L226 Difference]: Without dead ends: 2113 [2021-12-17 20:27:59,554 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 [2021-12-17 20:27:59,554 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 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 [2021-12-17 20:27:59,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-12-17 20:27:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2021-12-17 20:27:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2109 states have (on average 1.7292555713608344) internal successors, (3647), 2110 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3647 transitions. [2021-12-17 20:27:59,659 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3647 transitions. Word has length 43 [2021-12-17 20:27:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:59,659 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 3647 transitions. [2021-12-17 20:27:59,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3647 transitions. [2021-12-17 20:27:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 20:27:59,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:59,660 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] [2021-12-17 20:27:59,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 20:27:59,661 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-12-17 20:27:59,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:59,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222400265] [2021-12-17 20:27:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:59,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:27:59,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:59,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222400265] [2021-12-17 20:27:59,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222400265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:59,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:59,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:27:59,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921619035] [2021-12-17 20:27:59,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:59,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:27:59,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:27:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:27:59,717 INFO L87 Difference]: Start difference. First operand 2111 states and 3647 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:27:59,824 INFO L93 Difference]: Finished difference Result 2634 states and 4375 transitions. [2021-12-17 20:27:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:27:59,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-17 20:27:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:27:59,834 INFO L225 Difference]: With dead ends: 2634 [2021-12-17 20:27:59,835 INFO L226 Difference]: Without dead ends: 2632 [2021-12-17 20:27:59,836 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 [2021-12-17 20:27:59,836 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:27:59,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:27:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-12-17 20:27:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2021-12-17 20:27:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2157 states have (on average 1.7111729253592953) internal successors, (3691), 2158 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3691 transitions. [2021-12-17 20:27:59,905 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3691 transitions. Word has length 44 [2021-12-17 20:27:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:27:59,906 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 3691 transitions. [2021-12-17 20:27:59,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:27:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3691 transitions. [2021-12-17 20:27:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:27:59,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:27:59,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:27:59,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 20:27:59,908 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:27:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:27:59,909 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-12-17 20:27:59,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:27:59,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206858017] [2021-12-17 20:27:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:27:59,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:27:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:27:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 20:27:59,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:27:59,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206858017] [2021-12-17 20:27:59,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206858017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:27:59,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:27:59,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:27:59,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461193078] [2021-12-17 20:27:59,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:27:59,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:27:59,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:27:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:27:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:27:59,962 INFO L87 Difference]: Start difference. First operand 2159 states and 3691 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:00,137 INFO L93 Difference]: Finished difference Result 4187 states and 6539 transitions. [2021-12-17 20:28:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:28:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 20:28:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:00,151 INFO L225 Difference]: With dead ends: 4187 [2021-12-17 20:28:00,152 INFO L226 Difference]: Without dead ends: 3557 [2021-12-17 20:28:00,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:28:00,154 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 3075 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:00,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-12-17 20:28:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2021-12-17 20:28:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2785 states have (on average 1.6398563734290843) internal successors, (4567), 2786 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4567 transitions. [2021-12-17 20:28:00,268 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4567 transitions. Word has length 64 [2021-12-17 20:28:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:00,268 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4567 transitions. [2021-12-17 20:28:00,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4567 transitions. [2021-12-17 20:28:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:28:00,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:00,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:00,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 20:28:00,271 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-12-17 20:28:00,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:00,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524795815] [2021-12-17 20:28:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:00,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 20:28:00,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524795815] [2021-12-17 20:28:00,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524795815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:00,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:00,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:28:00,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015126251] [2021-12-17 20:28:00,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:00,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:28:00,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:00,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:28:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:28:00,356 INFO L87 Difference]: Start difference. First operand 2787 states and 4567 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:00,552 INFO L93 Difference]: Finished difference Result 4815 states and 7415 transitions. [2021-12-17 20:28:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:28:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-12-17 20:28:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:00,569 INFO L225 Difference]: With dead ends: 4815 [2021-12-17 20:28:00,569 INFO L226 Difference]: Without dead ends: 4185 [2021-12-17 20:28:00,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:28:00,572 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3065 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:00,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 3213 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-12-17 20:28:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2021-12-17 20:28:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3729 states have (on average 1.5744167337087691) internal successors, (5871), 3730 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5871 transitions. [2021-12-17 20:28:00,716 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5871 transitions. Word has length 64 [2021-12-17 20:28:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:00,716 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5871 transitions. [2021-12-17 20:28:00,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5871 transitions. [2021-12-17 20:28:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:28:00,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:00,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:00,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 20:28:00,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-12-17 20:28:00,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:00,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686685385] [2021-12-17 20:28:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:00,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:28:00,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686685385] [2021-12-17 20:28:00,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686685385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:00,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:00,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:28:00,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209282172] [2021-12-17 20:28:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:00,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:28:00,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:28:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:28:00,769 INFO L87 Difference]: Start difference. First operand 3731 states and 5871 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:00,956 INFO L93 Difference]: Finished difference Result 5083 states and 7795 transitions. [2021-12-17 20:28:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:28:00,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 20:28:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:00,977 INFO L225 Difference]: With dead ends: 5083 [2021-12-17 20:28:00,977 INFO L226 Difference]: Without dead ends: 4633 [2021-12-17 20:28:00,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:28:00,980 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3066 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:00,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-12-17 20:28:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2021-12-17 20:28:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.5568589897055303) internal successors, (6503), 4178 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6503 transitions. [2021-12-17 20:28:01,195 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6503 transitions. Word has length 64 [2021-12-17 20:28:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:01,196 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6503 transitions. [2021-12-17 20:28:01,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6503 transitions. [2021-12-17 20:28:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 20:28:01,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:01,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:01,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 20:28:01,199 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-12-17 20:28:01,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380631116] [2021-12-17 20:28:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:01,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:01,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:01,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380631116] [2021-12-17 20:28:01,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380631116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:01,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:01,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:28:01,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370416390] [2021-12-17 20:28:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:01,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:28:01,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:01,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:28:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:28:01,245 INFO L87 Difference]: Start difference. First operand 4179 states and 6503 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) [2021-12-17 20:28:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:01,383 INFO L93 Difference]: Finished difference Result 6831 states and 10205 transitions. [2021-12-17 20:28:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:28:01,384 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 [2021-12-17 20:28:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:01,392 INFO L225 Difference]: With dead ends: 6831 [2021-12-17 20:28:01,392 INFO L226 Difference]: Without dead ends: 4181 [2021-12-17 20:28:01,397 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 [2021-12-17 20:28:01,397 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:01,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-12-17 20:28:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2021-12-17 20:28:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.5448886760833134) internal successors, (6453), 4178 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6453 transitions. [2021-12-17 20:28:01,552 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6453 transitions. Word has length 65 [2021-12-17 20:28:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:01,553 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6453 transitions. [2021-12-17 20:28:01,553 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) [2021-12-17 20:28:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6453 transitions. [2021-12-17 20:28:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 20:28:01,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:01,554 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:28:01,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 20:28:01,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-12-17 20:28:01,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:01,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116205214] [2021-12-17 20:28:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:01,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:01,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116205214] [2021-12-17 20:28:01,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116205214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:01,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:01,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:28:01,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791730416] [2021-12-17 20:28:01,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:01,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:28:01,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:28:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:28:01,588 INFO L87 Difference]: Start difference. First operand 4179 states and 6453 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) [2021-12-17 20:28:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:01,672 INFO L93 Difference]: Finished difference Result 5507 states and 8280 transitions. [2021-12-17 20:28:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:28:01,673 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 [2021-12-17 20:28:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:01,679 INFO L225 Difference]: With dead ends: 5507 [2021-12-17 20:28:01,679 INFO L226 Difference]: Without dead ends: 2857 [2021-12-17 20:28:01,682 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 [2021-12-17 20:28:01,683 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:01,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2021-12-17 20:28:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2021-12-17 20:28:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2853 states have (on average 1.6133894146512444) internal successors, (4603), 2854 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4603 transitions. [2021-12-17 20:28:01,769 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4603 transitions. Word has length 65 [2021-12-17 20:28:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:01,769 INFO L470 AbstractCegarLoop]: Abstraction has 2855 states and 4603 transitions. [2021-12-17 20:28:01,769 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) [2021-12-17 20:28:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4603 transitions. [2021-12-17 20:28:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 20:28:01,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:01,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:01,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 20:28:01,771 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-12-17 20:28:01,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:01,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319219998] [2021-12-17 20:28:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:01,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:02,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:02,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319219998] [2021-12-17 20:28:02,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319219998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:28:02,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191071908] [2021-12-17 20:28:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:02,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:02,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:28:02,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:28:02,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 20:28:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 20:28:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:28:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:28:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:02,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191071908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:28:02,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:28:02,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-17 20:28:02,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481767384] [2021-12-17 20:28:02,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:28:02,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 20:28:02,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:02,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 20:28:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-17 20:28:02,868 INFO L87 Difference]: Start difference. First operand 2855 states and 4603 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:10,889 INFO L93 Difference]: Finished difference Result 21660 states and 29610 transitions. [2021-12-17 20:28:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-12-17 20:28:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 [2021-12-17 20:28:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:10,937 INFO L225 Difference]: With dead ends: 21660 [2021-12-17 20:28:10,937 INFO L226 Difference]: Without dead ends: 20110 [2021-12-17 20:28:10,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17700 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5018, Invalid=36802, Unknown=0, NotChecked=0, Total=41820 [2021-12-17 20:28:10,958 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 17099 mSDsluCounter, 10025 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17099 SdHoareTripleChecker+Valid, 11607 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:10,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17099 Valid, 11607 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 20:28:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2021-12-17 20:28:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 13931. [2021-12-17 20:28:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13929 states have (on average 1.3741115657979754) internal successors, (19140), 13930 states have internal predecessors, (19140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 19140 transitions. [2021-12-17 20:28:11,765 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 19140 transitions. Word has length 65 [2021-12-17 20:28:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:11,765 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 19140 transitions. [2021-12-17 20:28:11,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 19140 transitions. [2021-12-17 20:28:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:28:11,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:11,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:11,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 20:28:11,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 20:28:11,984 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:11,984 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-12-17 20:28:11,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:11,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556409660] [2021-12-17 20:28:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:11,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:12,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:12,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556409660] [2021-12-17 20:28:12,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556409660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:28:12,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097352181] [2021-12-17 20:28:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:12,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:28:12,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:28:12,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 20:28:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 20:28:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:28:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:12,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:28:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:13,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097352181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:28:13,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:28:13,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-17 20:28:13,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947743581] [2021-12-17 20:28:13,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:28:13,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 20:28:13,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 20:28:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-17 20:28:13,442 INFO L87 Difference]: Start difference. First operand 13931 states and 19140 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:15,780 INFO L93 Difference]: Finished difference Result 56272 states and 74058 transitions. [2021-12-17 20:28:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 20:28:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 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 [2021-12-17 20:28:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:15,912 INFO L225 Difference]: With dead ends: 56272 [2021-12-17 20:28:15,913 INFO L226 Difference]: Without dead ends: 46210 [2021-12-17 20:28:15,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 20:28:15,944 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 12379 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12379 SdHoareTripleChecker+Valid, 5129 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:15,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12379 Valid, 5129 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 20:28:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46210 states. [2021-12-17 20:28:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46210 to 28584. [2021-12-17 20:28:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28584 states, 28582 states have (on average 1.3376950528304528) internal successors, (38234), 28583 states have internal predecessors, (38234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28584 states to 28584 states and 38234 transitions. [2021-12-17 20:28:17,516 INFO L78 Accepts]: Start accepts. Automaton has 28584 states and 38234 transitions. Word has length 66 [2021-12-17 20:28:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:17,516 INFO L470 AbstractCegarLoop]: Abstraction has 28584 states and 38234 transitions. [2021-12-17 20:28:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 28584 states and 38234 transitions. [2021-12-17 20:28:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:28:17,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:17,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:17,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 20:28:17,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 20:28:17,739 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2021-12-17 20:28:17,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965855364] [2021-12-17 20:28:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:17,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:17,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965855364] [2021-12-17 20:28:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965855364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:28:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220151370] [2021-12-17 20:28:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:17,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:17,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:28:17,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:28:17,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 20:28:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 20:28:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:28:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:18,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:28:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:19,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220151370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:28:19,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:28:19,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-17 20:28:19,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285676983] [2021-12-17 20:28:19,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:28:19,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 20:28:19,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:19,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 20:28:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-17 20:28:19,003 INFO L87 Difference]: Start difference. First operand 28584 states and 38234 transitions. Second operand has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:26,097 INFO L93 Difference]: Finished difference Result 160017 states and 209209 transitions. [2021-12-17 20:28:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 20:28:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 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 [2021-12-17 20:28:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:26,366 INFO L225 Difference]: With dead ends: 160017 [2021-12-17 20:28:26,367 INFO L226 Difference]: Without dead ends: 132962 [2021-12-17 20:28:26,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 20:28:26,437 INFO L933 BasicCegarLoop]: 1523 mSDtfsCounter, 17667 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17667 SdHoareTripleChecker+Valid, 4878 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:26,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17667 Valid, 4878 Invalid, 600 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [82 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 20:28:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132962 states. [2021-12-17 20:28:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132962 to 64538. [2021-12-17 20:28:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64538 states, 64536 states have (on average 1.3065420850378084) internal successors, (84319), 64537 states have internal predecessors, (84319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64538 states to 64538 states and 84319 transitions. [2021-12-17 20:28:30,545 INFO L78 Accepts]: Start accepts. Automaton has 64538 states and 84319 transitions. Word has length 66 [2021-12-17 20:28:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:30,545 INFO L470 AbstractCegarLoop]: Abstraction has 64538 states and 84319 transitions. [2021-12-17 20:28:30,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 64538 states and 84319 transitions. [2021-12-17 20:28:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:28:30,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:30,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:30,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 20:28:30,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:30,771 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-12-17 20:28:30,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:30,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841594527] [2021-12-17 20:28:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:30,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:30,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841594527] [2021-12-17 20:28:30,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841594527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:30,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:30,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:28:30,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37291522] [2021-12-17 20:28:30,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:30,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:28:30,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:28:30,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:28:30,825 INFO L87 Difference]: Start difference. First operand 64538 states and 84319 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) [2021-12-17 20:28:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:32,478 INFO L93 Difference]: Finished difference Result 92591 states and 120569 transitions. [2021-12-17 20:28:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:28:32,478 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 [2021-12-17 20:28:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:32,511 INFO L225 Difference]: With dead ends: 92591 [2021-12-17 20:28:32,511 INFO L226 Difference]: Without dead ends: 29582 [2021-12-17 20:28:32,541 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 [2021-12-17 20:28:32,544 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 17 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:32,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29582 states. [2021-12-17 20:28:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29582 to 26281. [2021-12-17 20:28:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26281 states, 26279 states have (on average 1.3022565546634195) internal successors, (34222), 26280 states have internal predecessors, (34222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26281 states to 26281 states and 34222 transitions. [2021-12-17 20:28:33,940 INFO L78 Accepts]: Start accepts. Automaton has 26281 states and 34222 transitions. Word has length 66 [2021-12-17 20:28:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:33,940 INFO L470 AbstractCegarLoop]: Abstraction has 26281 states and 34222 transitions. [2021-12-17 20:28:33,940 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) [2021-12-17 20:28:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26281 states and 34222 transitions. [2021-12-17 20:28:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:28:33,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:33,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:33,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 20:28:33,942 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:33,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-12-17 20:28:33,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:33,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749270845] [2021-12-17 20:28:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:33,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 20:28:33,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:33,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749270845] [2021-12-17 20:28:33,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749270845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:33,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:33,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:28:33,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623789309] [2021-12-17 20:28:33,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:33,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:28:33,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:28:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:28:33,986 INFO L87 Difference]: Start difference. First operand 26281 states and 34222 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:35,432 INFO L93 Difference]: Finished difference Result 47092 states and 60783 transitions. [2021-12-17 20:28:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:28:35,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:28:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:35,459 INFO L225 Difference]: With dead ends: 47092 [2021-12-17 20:28:35,459 INFO L226 Difference]: Without dead ends: 22417 [2021-12-17 20:28:35,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 20:28:35,485 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4498 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:35,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 2965 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:28:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22417 states. [2021-12-17 20:28:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22417 to 22417. [2021-12-17 20:28:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22417 states, 22415 states have (on average 1.2865045728306936) internal successors, (28837), 22416 states have internal predecessors, (28837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22417 states to 22417 states and 28837 transitions. [2021-12-17 20:28:36,852 INFO L78 Accepts]: Start accepts. Automaton has 22417 states and 28837 transitions. Word has length 66 [2021-12-17 20:28:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:36,852 INFO L470 AbstractCegarLoop]: Abstraction has 22417 states and 28837 transitions. [2021-12-17 20:28:36,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22417 states and 28837 transitions. [2021-12-17 20:28:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:28:36,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:36,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:36,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 20:28:36,854 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-12-17 20:28:36,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99557650] [2021-12-17 20:28:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:36,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 20:28:36,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:36,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99557650] [2021-12-17 20:28:36,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99557650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:36,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:36,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:28:36,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775193620] [2021-12-17 20:28:36,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:36,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:28:36,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:36,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:28:36,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:28:36,896 INFO L87 Difference]: Start difference. First operand 22417 states and 28837 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:37,687 INFO L93 Difference]: Finished difference Result 37943 states and 48228 transitions. [2021-12-17 20:28:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:28:37,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-12-17 20:28:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:37,708 INFO L225 Difference]: With dead ends: 37943 [2021-12-17 20:28:37,708 INFO L226 Difference]: Without dead ends: 17168 [2021-12-17 20:28:37,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 20:28:37,725 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4504 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:37,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 2959 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17168 states. [2021-12-17 20:28:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17168 to 17168. [2021-12-17 20:28:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17168 states, 17166 states have (on average 1.277117557963416) internal successors, (21923), 17167 states have internal predecessors, (21923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 21923 transitions. [2021-12-17 20:28:38,624 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 21923 transitions. Word has length 66 [2021-12-17 20:28:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:38,625 INFO L470 AbstractCegarLoop]: Abstraction has 17168 states and 21923 transitions. [2021-12-17 20:28:38,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 21923 transitions. [2021-12-17 20:28:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:28:38,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:38,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:38,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 20:28:38,627 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:38,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-12-17 20:28:38,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:38,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466081102] [2021-12-17 20:28:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:38,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 20:28:38,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:38,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466081102] [2021-12-17 20:28:38,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466081102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:28:38,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:28:38,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:28:38,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444379847] [2021-12-17 20:28:38,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:28:38,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:28:38,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:28:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:28:38,669 INFO L87 Difference]: Start difference. First operand 17168 states and 21923 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:39,352 INFO L93 Difference]: Finished difference Result 29362 states and 36948 transitions. [2021-12-17 20:28:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:28:39,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2021-12-17 20:28:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:39,367 INFO L225 Difference]: With dead ends: 29362 [2021-12-17 20:28:39,367 INFO L226 Difference]: Without dead ends: 13759 [2021-12-17 20:28:39,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 20:28:39,378 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4510 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:39,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4510 Valid, 2953 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:28:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13759 states. [2021-12-17 20:28:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13759 to 13759. [2021-12-17 20:28:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13757 states have (on average 1.279712146543578) internal successors, (17605), 13758 states have internal predecessors, (17605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 17605 transitions. [2021-12-17 20:28:40,123 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 17605 transitions. Word has length 66 [2021-12-17 20:28:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:40,123 INFO L470 AbstractCegarLoop]: Abstraction has 13759 states and 17605 transitions. [2021-12-17 20:28:40,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 17605 transitions. [2021-12-17 20:28:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:28:40,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:40,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:40,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 20:28:40,125 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-12-17 20:28:40,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:40,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112017002] [2021-12-17 20:28:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:40,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:40,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112017002] [2021-12-17 20:28:40,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112017002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:28:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035372016] [2021-12-17 20:28:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:40,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:40,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:28:40,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:28:40,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 20:28:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:40,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 20:28:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:28:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:41,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:28:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:42,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035372016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:28:42,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:28:42,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2021-12-17 20:28:42,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437734872] [2021-12-17 20:28:42,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:28:42,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 20:28:42,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:42,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 20:28:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 20:28:42,103 INFO L87 Difference]: Start difference. First operand 13759 states and 17605 transitions. Second operand has 33 states, 33 states have (on average 5.0) internal successors, (165), 33 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:44,863 INFO L93 Difference]: Finished difference Result 29455 states and 36844 transitions. [2021-12-17 20:28:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 20:28:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0) internal successors, (165), 33 states have internal predecessors, (165), 0 states have call successors, (0), 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 [2021-12-17 20:28:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:44,895 INFO L225 Difference]: With dead ends: 29455 [2021-12-17 20:28:44,896 INFO L226 Difference]: Without dead ends: 24181 [2021-12-17 20:28:44,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=576, Invalid=2180, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 20:28:44,907 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 11494 mSDsluCounter, 18958 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11494 SdHoareTripleChecker+Valid, 20546 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:44,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11494 Valid, 20546 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 20:28:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24181 states. [2021-12-17 20:28:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24181 to 12017. [2021-12-17 20:28:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 12015 states have (on average 1.2845609654598418) internal successors, (15434), 12016 states have internal predecessors, (15434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 15434 transitions. [2021-12-17 20:28:45,817 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 15434 transitions. Word has length 67 [2021-12-17 20:28:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:45,817 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 15434 transitions. [2021-12-17 20:28:45,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.0) internal successors, (165), 33 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 15434 transitions. [2021-12-17 20:28:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:28:45,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:45,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:45,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 20:28:46,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:46,019 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash 138650479, now seen corresponding path program 1 times [2021-12-17 20:28:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788030536] [2021-12-17 20:28:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:46,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:46,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:46,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788030536] [2021-12-17 20:28:46,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788030536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:28:46,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336033718] [2021-12-17 20:28:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:46,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:46,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:28:46,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:28:46,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 20:28:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 20:28:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:28:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:47,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:28:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:47,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336033718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:28:47,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:28:47,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2021-12-17 20:28:47,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411288629] [2021-12-17 20:28:47,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:28:47,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 20:28:47,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 20:28:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-12-17 20:28:47,883 INFO L87 Difference]: Start difference. First operand 12017 states and 15434 transitions. Second operand has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:28:49,954 INFO L93 Difference]: Finished difference Result 22127 states and 27935 transitions. [2021-12-17 20:28:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 20:28:49,955 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 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 [2021-12-17 20:28:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:28:49,974 INFO L225 Difference]: With dead ends: 22127 [2021-12-17 20:28:49,974 INFO L226 Difference]: Without dead ends: 16859 [2021-12-17 20:28:49,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 20:28:49,981 INFO L933 BasicCegarLoop]: 1573 mSDtfsCounter, 8443 mSDsluCounter, 17834 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8443 SdHoareTripleChecker+Valid, 19407 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 20:28:49,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8443 Valid, 19407 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 20:28:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16859 states. [2021-12-17 20:28:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16859 to 9437. [2021-12-17 20:28:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9437 states, 9435 states have (on average 1.2998410174880763) internal successors, (12264), 9436 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9437 states to 9437 states and 12264 transitions. [2021-12-17 20:28:50,577 INFO L78 Accepts]: Start accepts. Automaton has 9437 states and 12264 transitions. Word has length 67 [2021-12-17 20:28:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:28:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 9437 states and 12264 transitions. [2021-12-17 20:28:50,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:28:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 9437 states and 12264 transitions. [2021-12-17 20:28:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 20:28:50,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:28:50,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:28:50,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 20:28:50,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 20:28:50,779 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:28:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:28:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1574375839, now seen corresponding path program 1 times [2021-12-17 20:28:50,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:28:50,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624857266] [2021-12-17 20:28:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:50,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:28:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:51,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:28:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624857266] [2021-12-17 20:28:51,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624857266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:28:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111616922] [2021-12-17 20:28:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:28:51,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:28:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:28:51,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:28:51,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 20:28:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:28:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 20:28:51,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:28:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:53,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:28:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:28:55,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111616922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:28:55,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:28:55,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 21] total 62 [2021-12-17 20:28:55,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602477238] [2021-12-17 20:28:55,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:28:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 20:28:55,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:28:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 20:28:55,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=3450, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 20:28:55,495 INFO L87 Difference]: Start difference. First operand 9437 states and 12264 transitions. Second operand has 62 states, 62 states have (on average 2.935483870967742) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:29:10,028 INFO L93 Difference]: Finished difference Result 30581 states and 37169 transitions. [2021-12-17 20:29:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-17 20:29:10,028 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.935483870967742) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 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 [2021-12-17 20:29:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:29:10,060 INFO L225 Difference]: With dead ends: 30581 [2021-12-17 20:29:10,060 INFO L226 Difference]: Without dead ends: 25675 [2021-12-17 20:29:10,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8335 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=3964, Invalid=26836, Unknown=0, NotChecked=0, Total=30800 [2021-12-17 20:29:10,074 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 28142 mSDsluCounter, 31194 mSDsCounter, 0 mSdLazyCounter, 2671 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28142 SdHoareTripleChecker+Valid, 32873 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 20:29:10,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28142 Valid, 32873 Invalid, 2963 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [292 Valid, 2671 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 20:29:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25675 states. [2021-12-17 20:29:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25675 to 11480. [2021-12-17 20:29:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11480 states, 11478 states have (on average 1.2889005053145148) internal successors, (14794), 11479 states have internal predecessors, (14794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11480 states to 11480 states and 14794 transitions. [2021-12-17 20:29:10,983 INFO L78 Accepts]: Start accepts. Automaton has 11480 states and 14794 transitions. Word has length 68 [2021-12-17 20:29:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:29:10,983 INFO L470 AbstractCegarLoop]: Abstraction has 11480 states and 14794 transitions. [2021-12-17 20:29:10,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.935483870967742) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 11480 states and 14794 transitions. [2021-12-17 20:29:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 20:29:10,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:29:10,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:29:11,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 20:29:11,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:29:11,185 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:29:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:29:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1505885621, now seen corresponding path program 1 times [2021-12-17 20:29:11,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:29:11,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781384300] [2021-12-17 20:29:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:29:11,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:29:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:29:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:29:11,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:29:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781384300] [2021-12-17 20:29:11,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781384300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:29:11,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:29:11,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:29:11,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362720189] [2021-12-17 20:29:11,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:29:11,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:29:11,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:29:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:29:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:29:11,223 INFO L87 Difference]: Start difference. First operand 11480 states and 14794 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:29:14,260 INFO L93 Difference]: Finished difference Result 13735 states and 18909 transitions. [2021-12-17 20:29:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:29:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-12-17 20:29:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:29:14,272 INFO L225 Difference]: With dead ends: 13735 [2021-12-17 20:29:14,272 INFO L226 Difference]: Without dead ends: 12231 [2021-12-17 20:29:14,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:29:14,275 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 854 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 20:29:14,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 523 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 20:29:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12231 states. [2021-12-17 20:29:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12231 to 12231. [2021-12-17 20:29:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12231 states, 12229 states have (on average 1.2485894185951427) internal successors, (15269), 12230 states have internal predecessors, (15269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 15269 transitions. [2021-12-17 20:29:15,195 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 15269 transitions. Word has length 89 [2021-12-17 20:29:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:29:15,195 INFO L470 AbstractCegarLoop]: Abstraction has 12231 states and 15269 transitions. [2021-12-17 20:29:15,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 15269 transitions. [2021-12-17 20:29:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 20:29:15,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:29:15,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:29:15,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 20:29:15,197 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:29:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:29:15,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1410105670, now seen corresponding path program 1 times [2021-12-17 20:29:15,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:29:15,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210080384] [2021-12-17 20:29:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:29:15,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:29:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:29:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 20:29:15,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:29:15,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210080384] [2021-12-17 20:29:15,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210080384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:29:15,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:29:15,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:29:15,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681886678] [2021-12-17 20:29:15,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:29:15,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:29:15,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:29:15,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:29:15,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:29:15,241 INFO L87 Difference]: Start difference. First operand 12231 states and 15269 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:29:18,547 INFO L93 Difference]: Finished difference Result 16739 states and 21770 transitions. [2021-12-17 20:29:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:29:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-17 20:29:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:29:18,563 INFO L225 Difference]: With dead ends: 16739 [2021-12-17 20:29:18,563 INFO L226 Difference]: Without dead ends: 14484 [2021-12-17 20:29:18,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:29:18,567 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 800 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 20:29:18,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 693 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 20:29:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14484 states. [2021-12-17 20:29:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14484 to 14484. [2021-12-17 20:29:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14484 states, 14482 states have (on average 1.2322883579616075) internal successors, (17846), 14483 states have internal predecessors, (17846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14484 states to 14484 states and 17846 transitions. [2021-12-17 20:29:19,452 INFO L78 Accepts]: Start accepts. Automaton has 14484 states and 17846 transitions. Word has length 91 [2021-12-17 20:29:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:29:19,453 INFO L470 AbstractCegarLoop]: Abstraction has 14484 states and 17846 transitions. [2021-12-17 20:29:19,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 14484 states and 17846 transitions. [2021-12-17 20:29:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 20:29:19,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:29:19,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:29:19,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 20:29:19,455 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:29:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:29:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash -726132279, now seen corresponding path program 1 times [2021-12-17 20:29:19,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:29:19,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000309716] [2021-12-17 20:29:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:29:19,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:29:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:29:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:29:19,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:29:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000309716] [2021-12-17 20:29:19,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000309716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:29:19,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:29:19,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:29:19,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301045842] [2021-12-17 20:29:19,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:29:19,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 20:29:19,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:29:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 20:29:19,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 20:29:19,505 INFO L87 Difference]: Start difference. First operand 14484 states and 17846 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:29:23,890 INFO L93 Difference]: Finished difference Result 24249 states and 30300 transitions. [2021-12-17 20:29:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 20:29:23,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-17 20:29:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:29:23,910 INFO L225 Difference]: With dead ends: 24249 [2021-12-17 20:29:23,910 INFO L226 Difference]: Without dead ends: 19741 [2021-12-17 20:29:23,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:29:23,918 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 2412 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4542 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2412 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 5252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 4542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 20:29:23,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2412 Valid, 378 Invalid, 5252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 4542 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 20:29:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19741 states. [2021-12-17 20:29:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19741 to 19741. [2021-12-17 20:29:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19741 states, 19739 states have (on average 1.2184507827144233) internal successors, (24051), 19740 states have internal predecessors, (24051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19741 states to 19741 states and 24051 transitions. [2021-12-17 20:29:24,958 INFO L78 Accepts]: Start accepts. Automaton has 19741 states and 24051 transitions. Word has length 97 [2021-12-17 20:29:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:29:24,959 INFO L470 AbstractCegarLoop]: Abstraction has 19741 states and 24051 transitions. [2021-12-17 20:29:24,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19741 states and 24051 transitions. [2021-12-17 20:29:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:29:24,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:29:24,961 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:29:24,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 20:29:24,961 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:29:24,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:29:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash -667212466, now seen corresponding path program 1 times [2021-12-17 20:29:24,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:29:24,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284299243] [2021-12-17 20:29:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:29:24,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:29:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:29:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:29:25,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:29:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284299243] [2021-12-17 20:29:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284299243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:29:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182020829] [2021-12-17 20:29:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:29:25,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:29:25,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:29:25,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:29:25,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 20:29:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:29:25,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 20:29:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:29:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 37 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:29:26,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:29:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:29:27,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182020829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:29:27,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:29:27,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 35 [2021-12-17 20:29:27,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945697593] [2021-12-17 20:29:27,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:29:27,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 20:29:27,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:29:27,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 20:29:27,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 20:29:27,007 INFO L87 Difference]: Start difference. First operand 19741 states and 24051 transitions. Second operand has 35 states, 35 states have (on average 8.714285714285714) internal successors, (305), 35 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:29:46,858 INFO L93 Difference]: Finished difference Result 53860 states and 64040 transitions. [2021-12-17 20:29:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-12-17 20:29:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 8.714285714285714) internal successors, (305), 35 states have internal predecessors, (305), 0 states have call successors, (0), 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 112 [2021-12-17 20:29:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:29:46,911 INFO L225 Difference]: With dead ends: 53860 [2021-12-17 20:29:46,911 INFO L226 Difference]: Without dead ends: 45851 [2021-12-17 20:29:46,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 228 SyntacticMatches, 4 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19343 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=5950, Invalid=44900, Unknown=0, NotChecked=0, Total=50850 [2021-12-17 20:29:46,932 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 18126 mSDsluCounter, 25098 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18126 SdHoareTripleChecker+Valid, 26695 SdHoareTripleChecker+Invalid, 3100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 20:29:46,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18126 Valid, 26695 Invalid, 3100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 20:29:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45851 states. [2021-12-17 20:29:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45851 to 23168. [2021-12-17 20:29:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23168 states, 23166 states have (on average 1.217258050591384) internal successors, (28199), 23167 states have internal predecessors, (28199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23168 states to 23168 states and 28199 transitions. [2021-12-17 20:29:48,743 INFO L78 Accepts]: Start accepts. Automaton has 23168 states and 28199 transitions. Word has length 112 [2021-12-17 20:29:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:29:48,743 INFO L470 AbstractCegarLoop]: Abstraction has 23168 states and 28199 transitions. [2021-12-17 20:29:48,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.714285714285714) internal successors, (305), 35 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:29:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23168 states and 28199 transitions. [2021-12-17 20:29:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 20:29:48,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:29:48,746 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:29:48,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 20:29:48,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:29:48,951 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:29:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:29:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 364136701, now seen corresponding path program 1 times [2021-12-17 20:29:48,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:29:48,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391341611] [2021-12-17 20:29:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:29:48,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:29:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:29:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:29:49,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:29:49,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391341611] [2021-12-17 20:29:49,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391341611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:29:49,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344574965] [2021-12-17 20:29:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:29:49,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:29:49,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:29:49,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:29:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 20:29:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:29:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 20:29:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:29:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:29:51,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15