./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_overflow.ufo.UNBOUNDED.pals+Problem12_label05.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 64562d20261a98c4fff8930ffc2f21f6ad2db9602778187addddf7335f143802 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:22:06,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:22:06,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:22:06,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:22:06,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:22:06,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:22:06,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:22:06,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:22:06,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:22:06,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:22:06,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:22:06,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:22:06,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:22:06,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:22:06,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:22:06,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:22:06,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:22:06,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:22:06,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:22:06,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:22:06,516 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:22:06,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:22:06,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:22:06,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:22:06,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:22:06,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:22:06,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:22:06,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:22:06,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:22:06,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:22:06,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:22:06,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:22:06,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:22:06,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:22:06,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:22:06,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:22:06,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:22:06,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:22:06,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:22:06,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:22:06,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:22:06,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:22:06,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:22:06,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:22:06,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:22:06,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:22:06,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:22:06,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:22:06,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:22:06,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:22:06,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:22:06,566 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:22:06,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:22:06,568 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:22:06,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:22:06,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:22:06,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:22:06,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:22:06,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:22:06,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:22:06,569 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:22:06,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:22:06,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:22:06,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:22:06,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:22:06,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:22:06,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:22:06,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:22:06,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:22:06,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:22:06,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:22:06,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:22:06,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:22:06,572 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:22:06,572 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:22:06,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:22:06,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64562d20261a98c4fff8930ffc2f21f6ad2db9602778187addddf7335f143802 [2022-07-22 20:22:06,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:22:06,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:22:06,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:22:06,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:22:06,823 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:22:06,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-22 20:22:06,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed39db70e/5b3319c7a2c04c52be7ff76197d7a31c/FLAG4bf69c4c1 [2022-07-22 20:22:07,529 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:22:07,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-22 20:22:07,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed39db70e/5b3319c7a2c04c52be7ff76197d7a31c/FLAG4bf69c4c1 [2022-07-22 20:22:07,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed39db70e/5b3319c7a2c04c52be7ff76197d7a31c [2022-07-22 20:22:07,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:22:07,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:22:07,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:22:07,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:22:07,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:22:07,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:22:07" (1/1) ... [2022-07-22 20:22:07,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb45c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:07, skipping insertion in model container [2022-07-22 20:22:07,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:22:07" (1/1) ... [2022-07-22 20:22:07,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:22:07,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:22:08,223 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_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[6524,6537] [2022-07-22 20:22:08,278 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_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[13460,13473] [2022-07-22 20:22:08,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:22:08,908 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:22:08,942 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_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[6524,6537] [2022-07-22 20:22:08,955 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_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[13460,13473] [2022-07-22 20:22:09,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:22:09,387 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:22:09,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09 WrapperNode [2022-07-22 20:22:09,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:22:09,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:22:09,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:22:09,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:22:09,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:09,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:09,742 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4974 [2022-07-22 20:22:09,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:22:09,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:22:09,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:22:09,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:22:09,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:09,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:09,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:09,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:09,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:09,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:10,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:10,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:22:10,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:22:10,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:22:10,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:22:10,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (1/1) ... [2022-07-22 20:22:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:22:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:22:10,224 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) [2022-07-22 20:22:10,249 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 [2022-07-22 20:22:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:22:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:22:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:22:10,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:22:10,450 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:22:10,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:22:13,793 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:22:13,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:22:13,808 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 20:22:13,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:22:13 BoogieIcfgContainer [2022-07-22 20:22:13,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:22:13,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:22:13,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:22:13,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:22:13,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:22:07" (1/3) ... [2022-07-22 20:22:13,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dbd515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:22:13, skipping insertion in model container [2022-07-22 20:22:13,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:22:09" (2/3) ... [2022-07-22 20:22:13,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dbd515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:22:13, skipping insertion in model container [2022-07-22 20:22:13,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:22:13" (3/3) ... [2022-07-22 20:22:13,818 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-22 20:22:13,830 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:22:13,831 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:22:13,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:22:13,890 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59def4c5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f679fc2 [2022-07-22 20:22:13,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:22:13,897 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) [2022-07-22 20:22:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 20:22:13,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:13,913 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:13,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:13,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2022-07-22 20:22:13,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:13,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593625184] [2022-07-22 20:22:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:13,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:14,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593625184] [2022-07-22 20:22:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593625184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:14,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 20:22:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629806374] [2022-07-22 20:22:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:14,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 20:22:14,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:14,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 20:22:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 20:22:14,175 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 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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) [2022-07-22 20:22:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:14,236 INFO L93 Difference]: Finished difference Result 1732 states and 3290 transitions. [2022-07-22 20:22:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 20:22:14,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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 [2022-07-22 20:22:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:14,253 INFO L225 Difference]: With dead ends: 1732 [2022-07-22 20:22:14,254 INFO L226 Difference]: Without dead ends: 812 [2022-07-22 20:22:14,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 20:22:14,264 INFO L413 NwaCegarLoop]: 1597 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:14,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-07-22 20:22:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-07-22 20:22:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2022-07-22 20:22:14,337 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2022-07-22 20:22:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:14,338 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2022-07-22 20:22:14,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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) [2022-07-22 20:22:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2022-07-22 20:22:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 20:22:14,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:14,340 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:14,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:22:14,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2022-07-22 20:22:14,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:14,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908570547] [2022-07-22 20:22:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:14,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:14,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908570547] [2022-07-22 20:22:14,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908570547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:14,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:14,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:22:14,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285098464] [2022-07-22 20:22:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:22:14,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:22:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:22:14,431 INFO L87 Difference]: Start difference. First operand 812 states and 1533 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) [2022-07-22 20:22:14,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:14,520 INFO L93 Difference]: Finished difference Result 852 states and 1593 transitions. [2022-07-22 20:22:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:22:14,521 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 [2022-07-22 20:22:14,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:14,526 INFO L225 Difference]: With dead ends: 852 [2022-07-22 20:22:14,526 INFO L226 Difference]: Without dead ends: 812 [2022-07-22 20:22:14,526 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:14,527 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 3 mSDsluCounter, 4574 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:14,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-07-22 20:22:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-07-22 20:22:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2022-07-22 20:22:14,545 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2022-07-22 20:22:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:14,546 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2022-07-22 20:22:14,546 INFO L496 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) [2022-07-22 20:22:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2022-07-22 20:22:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 20:22:14,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:14,547 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:14,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:22:14,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2022-07-22 20:22:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:14,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557980824] [2022-07-22 20:22:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:14,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:14,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:14,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557980824] [2022-07-22 20:22:14,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557980824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:14,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:14,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035727998] [2022-07-22 20:22:14,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:14,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:22:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:14,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:22:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:22:14,627 INFO L87 Difference]: Start difference. First operand 812 states and 1517 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) [2022-07-22 20:22:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:14,657 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2022-07-22 20:22:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:22:14,657 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 [2022-07-22 20:22:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:14,662 INFO L225 Difference]: With dead ends: 878 [2022-07-22 20:22:14,662 INFO L226 Difference]: Without dead ends: 842 [2022-07-22 20:22:14,666 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:14,669 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:14,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-07-22 20:22:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2022-07-22 20:22:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2022-07-22 20:22:14,688 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2022-07-22 20:22:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:14,689 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2022-07-22 20:22:14,689 INFO L496 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) [2022-07-22 20:22:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2022-07-22 20:22:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 20:22:14,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:14,693 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:14,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:22:14,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2022-07-22 20:22:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:14,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381665652] [2022-07-22 20:22:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:14,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:14,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381665652] [2022-07-22 20:22:14,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381665652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:14,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:14,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:22:14,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465736988] [2022-07-22 20:22:14,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:14,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:22:14,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:22:14,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:22:14,782 INFO L87 Difference]: Start difference. First operand 840 states and 1561 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) [2022-07-22 20:22:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:14,892 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2022-07-22 20:22:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:22:14,893 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 [2022-07-22 20:22:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:14,897 INFO L225 Difference]: With dead ends: 1224 [2022-07-22 20:22:14,898 INFO L226 Difference]: Without dead ends: 1160 [2022-07-22 20:22:14,898 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:14,904 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:14,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-07-22 20:22:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2022-07-22 20:22:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2022-07-22 20:22:14,926 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2022-07-22 20:22:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:14,926 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2022-07-22 20:22:14,926 INFO L496 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) [2022-07-22 20:22:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2022-07-22 20:22:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 20:22:14,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:14,928 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:22:14,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2022-07-22 20:22:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:14,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829196986] [2022-07-22 20:22:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:14,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:14,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:14,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829196986] [2022-07-22 20:22:14,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829196986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:14,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:14,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:14,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035664450] [2022-07-22 20:22:14,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:14,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:22:14,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:22:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:22:14,974 INFO L87 Difference]: Start difference. First operand 902 states and 1656 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) [2022-07-22 20:22:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:15,004 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2022-07-22 20:22:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:22:15,005 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 [2022-07-22 20:22:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:15,009 INFO L225 Difference]: With dead ends: 1089 [2022-07-22 20:22:15,009 INFO L226 Difference]: Without dead ends: 963 [2022-07-22 20:22:15,010 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:15,010 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:15,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-07-22 20:22:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2022-07-22 20:22:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2022-07-22 20:22:15,033 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2022-07-22 20:22:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:15,033 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2022-07-22 20:22:15,033 INFO L496 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) [2022-07-22 20:22:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2022-07-22 20:22:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 20:22:15,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:15,034 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:15,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:22:15,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:15,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2022-07-22 20:22:15,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:15,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476611917] [2022-07-22 20:22:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:15,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:15,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:15,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476611917] [2022-07-22 20:22:15,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476611917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:15,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:15,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:22:15,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424403695] [2022-07-22 20:22:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:22:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:22:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:22:15,122 INFO L87 Difference]: Start difference. First operand 961 states and 1744 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) [2022-07-22 20:22:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:15,201 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2022-07-22 20:22:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:22:15,201 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 [2022-07-22 20:22:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:15,205 INFO L225 Difference]: With dead ends: 1146 [2022-07-22 20:22:15,206 INFO L226 Difference]: Without dead ends: 963 [2022-07-22 20:22:15,206 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:15,208 INFO L413 NwaCegarLoop]: 1529 mSDtfsCounter, 3002 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3002 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:15,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3002 Valid, 1636 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-07-22 20:22:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2022-07-22 20:22:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2022-07-22 20:22:15,233 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2022-07-22 20:22:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:15,233 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2022-07-22 20:22:15,233 INFO L496 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) [2022-07-22 20:22:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2022-07-22 20:22:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 20:22:15,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:15,234 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:15,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 20:22:15,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2022-07-22 20:22:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:15,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014866769] [2022-07-22 20:22:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:15,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:15,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014866769] [2022-07-22 20:22:15,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014866769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:15,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:15,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:15,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171251492] [2022-07-22 20:22:15,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:15,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:22:15,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:15,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:22:15,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:22:15,267 INFO L87 Difference]: Start difference. First operand 961 states and 1741 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) [2022-07-22 20:22:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:15,300 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2022-07-22 20:22:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:22:15,301 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 [2022-07-22 20:22:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:15,305 INFO L225 Difference]: With dead ends: 1291 [2022-07-22 20:22:15,305 INFO L226 Difference]: Without dead ends: 1108 [2022-07-22 20:22:15,306 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:15,307 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:15,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-07-22 20:22:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2022-07-22 20:22:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2022-07-22 20:22:15,336 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2022-07-22 20:22:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:15,337 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2022-07-22 20:22:15,337 INFO L496 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) [2022-07-22 20:22:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2022-07-22 20:22:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 20:22:15,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:15,338 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:15,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 20:22:15,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:15,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2022-07-22 20:22:15,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:15,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715610846] [2022-07-22 20:22:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:15,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:15,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715610846] [2022-07-22 20:22:15,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715610846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:15,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:15,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:15,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964220988] [2022-07-22 20:22:15,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:15,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:22:15,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:22:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:22:15,369 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 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) [2022-07-22 20:22:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:15,434 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2022-07-22 20:22:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:22:15,435 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 [2022-07-22 20:22:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:15,440 INFO L225 Difference]: With dead ends: 1690 [2022-07-22 20:22:15,440 INFO L226 Difference]: Without dead ends: 1362 [2022-07-22 20:22:15,441 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:15,441 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:15,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-07-22 20:22:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2022-07-22 20:22:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2022-07-22 20:22:15,484 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2022-07-22 20:22:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:15,485 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2022-07-22 20:22:15,485 INFO L496 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) [2022-07-22 20:22:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2022-07-22 20:22:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 20:22:15,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:15,486 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:15,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:22:15,486 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:15,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2022-07-22 20:22:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:15,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816195431] [2022-07-22 20:22:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:15,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816195431] [2022-07-22 20:22:15,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816195431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:15,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:15,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:22:15,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919731901] [2022-07-22 20:22:15,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:15,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:22:15,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:15,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:22:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:22:15,603 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2022-07-22 20:22:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:15,771 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2022-07-22 20:22:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:22:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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 [2022-07-22 20:22:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:15,778 INFO L225 Difference]: With dead ends: 1883 [2022-07-22 20:22:15,779 INFO L226 Difference]: Without dead ends: 1881 [2022-07-22 20:22:15,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:22:15,780 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 424 mSDsluCounter, 8903 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 10434 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:15,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 10434 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-07-22 20:22:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2022-07-22 20:22:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2022-07-22 20:22:15,839 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2022-07-22 20:22:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:15,840 INFO L495 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2022-07-22 20:22:15,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2022-07-22 20:22:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2022-07-22 20:22:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 20:22:15,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:15,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:22:15,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:22:15,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1100178715, now seen corresponding path program 1 times [2022-07-22 20:22:15,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:15,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035174900] [2022-07-22 20:22:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:15,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:15,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:15,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035174900] [2022-07-22 20:22:15,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035174900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:15,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:15,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:15,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470979793] [2022-07-22 20:22:15,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:15,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:22:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:22:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:22:15,900 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:21,506 INFO L93 Difference]: Finished difference Result 3663 states and 6661 transitions. [2022-07-22 20:22:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 20:22:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 20:22:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:21,517 INFO L225 Difference]: With dead ends: 3663 [2022-07-22 20:22:21,518 INFO L226 Difference]: Without dead ends: 2910 [2022-07-22 20:22:21,519 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:21,520 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 2341 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:21,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2341 Valid, 771 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-22 20:22:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2022-07-22 20:22:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2022-07-22 20:22:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2908 states have (on average 1.5357634112792298) internal successors, (4466), 2909 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4466 transitions. [2022-07-22 20:22:21,660 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4466 transitions. Word has length 60 [2022-07-22 20:22:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:21,661 INFO L495 AbstractCegarLoop]: Abstraction has 2910 states and 4466 transitions. [2022-07-22 20:22:21,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4466 transitions. [2022-07-22 20:22:21,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 20:22:21,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:21,663 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:22:21,663 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2022-07-22 20:22:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:21,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012991073] [2022-07-22 20:22:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 20:22:21,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012991073] [2022-07-22 20:22:21,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012991073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:21,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:21,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:22:21,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378653717] [2022-07-22 20:22:21,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:21,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:22:21,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:22:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:22:21,749 INFO L87 Difference]: Start difference. First operand 2910 states and 4466 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) [2022-07-22 20:22:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:21,997 INFO L93 Difference]: Finished difference Result 4938 states and 7314 transitions. [2022-07-22 20:22:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:22:21,998 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 [2022-07-22 20:22:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:22,014 INFO L225 Difference]: With dead ends: 4938 [2022-07-22 20:22:22,014 INFO L226 Difference]: Without dead ends: 4308 [2022-07-22 20:22:22,017 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:22,017 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:22,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2022-07-22 20:22:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2022-07-22 20:22:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3536 states have (on average 1.5107466063348416) internal successors, (5342), 3537 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5342 transitions. [2022-07-22 20:22:22,205 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5342 transitions. Word has length 64 [2022-07-22 20:22:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:22,206 INFO L495 AbstractCegarLoop]: Abstraction has 3538 states and 5342 transitions. [2022-07-22 20:22:22,207 INFO L496 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) [2022-07-22 20:22:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5342 transitions. [2022-07-22 20:22:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 20:22:22,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:22,209 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:22:22,210 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2022-07-22 20:22:22,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:22,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880336343] [2022-07-22 20:22:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:22,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:22:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880336343] [2022-07-22 20:22:22,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880336343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:22,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:22,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:22:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320016159] [2022-07-22 20:22:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:22:22,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:22:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:22:22,279 INFO L87 Difference]: Start difference. First operand 3538 states and 5342 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) [2022-07-22 20:22:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:22,591 INFO L93 Difference]: Finished difference Result 5566 states and 8190 transitions. [2022-07-22 20:22:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:22:22,592 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 [2022-07-22 20:22:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:22,611 INFO L225 Difference]: With dead ends: 5566 [2022-07-22 20:22:22,611 INFO L226 Difference]: Without dead ends: 4936 [2022-07-22 20:22:22,613 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:22,615 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:22,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3065 Valid, 3213 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2022-07-22 20:22:22,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2022-07-22 20:22:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4480 states have (on average 1.4834821428571427) internal successors, (6646), 4481 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6646 transitions. [2022-07-22 20:22:22,896 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6646 transitions. Word has length 64 [2022-07-22 20:22:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:22,897 INFO L495 AbstractCegarLoop]: Abstraction has 4482 states and 6646 transitions. [2022-07-22 20:22:22,897 INFO L496 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) [2022-07-22 20:22:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6646 transitions. [2022-07-22 20:22:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 20:22:22,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:22,899 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:22,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:22:22,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2022-07-22 20:22:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:22,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322753345] [2022-07-22 20:22:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:22:22,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322753345] [2022-07-22 20:22:22,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322753345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:22,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:22,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:22:22,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434690752] [2022-07-22 20:22:22,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:22:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:22:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:22:22,966 INFO L87 Difference]: Start difference. First operand 4482 states and 6646 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) [2022-07-22 20:22:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:23,257 INFO L93 Difference]: Finished difference Result 5834 states and 8570 transitions. [2022-07-22 20:22:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:22:23,258 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 [2022-07-22 20:22:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:23,285 INFO L225 Difference]: With dead ends: 5834 [2022-07-22 20:22:23,286 INFO L226 Difference]: Without dead ends: 5384 [2022-07-22 20:22:23,288 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:23,289 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:23,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2022-07-22 20:22:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4930. [2022-07-22 20:22:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4768668831168832) internal successors, (7278), 4929 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7278 transitions. [2022-07-22 20:22:23,588 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7278 transitions. Word has length 64 [2022-07-22 20:22:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:23,588 INFO L495 AbstractCegarLoop]: Abstraction has 4930 states and 7278 transitions. [2022-07-22 20:22:23,589 INFO L496 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) [2022-07-22 20:22:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7278 transitions. [2022-07-22 20:22:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:22:23,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:23,594 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:23,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:22:23,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2022-07-22 20:22:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:23,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105199249] [2022-07-22 20:22:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:23,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105199249] [2022-07-22 20:22:23,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105199249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:23,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:23,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960804804] [2022-07-22 20:22:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:23,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:22:23,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:22:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:22:23,646 INFO L87 Difference]: Start difference. First operand 4930 states and 7278 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) [2022-07-22 20:22:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:23,862 INFO L93 Difference]: Finished difference Result 7582 states and 10980 transitions. [2022-07-22 20:22:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:22:23,863 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 [2022-07-22 20:22:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:23,872 INFO L225 Difference]: With dead ends: 7582 [2022-07-22 20:22:23,872 INFO L226 Difference]: Without dead ends: 4932 [2022-07-22 20:22:23,876 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:23,877 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:23,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:23,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2022-07-22 20:22:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4930. [2022-07-22 20:22:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4667207792207793) internal successors, (7228), 4929 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7228 transitions. [2022-07-22 20:22:24,149 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7228 transitions. Word has length 65 [2022-07-22 20:22:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:24,149 INFO L495 AbstractCegarLoop]: Abstraction has 4930 states and 7228 transitions. [2022-07-22 20:22:24,149 INFO L496 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) [2022-07-22 20:22:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7228 transitions. [2022-07-22 20:22:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:22:24,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:24,151 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:24,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:22:24,151 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2022-07-22 20:22:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608440812] [2022-07-22 20:22:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:24,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608440812] [2022-07-22 20:22:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608440812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:24,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395076534] [2022-07-22 20:22:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:22:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:22:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:22:24,182 INFO L87 Difference]: Start difference. First operand 4930 states and 7228 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) [2022-07-22 20:22:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:24,304 INFO L93 Difference]: Finished difference Result 6258 states and 9055 transitions. [2022-07-22 20:22:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:22:24,304 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 [2022-07-22 20:22:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:24,310 INFO L225 Difference]: With dead ends: 6258 [2022-07-22 20:22:24,310 INFO L226 Difference]: Without dead ends: 3608 [2022-07-22 20:22:24,315 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:24,316 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:24,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-07-22 20:22:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3606. [2022-07-22 20:22:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3604 states have (on average 1.4922308546059933) internal successors, (5378), 3605 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5378 transitions. [2022-07-22 20:22:24,455 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5378 transitions. Word has length 65 [2022-07-22 20:22:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:24,455 INFO L495 AbstractCegarLoop]: Abstraction has 3606 states and 5378 transitions. [2022-07-22 20:22:24,456 INFO L496 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) [2022-07-22 20:22:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5378 transitions. [2022-07-22 20:22:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 20:22:24,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:24,457 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:24,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:22:24,457 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:24,458 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2022-07-22 20:22:24,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:24,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102908323] [2022-07-22 20:22:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:24,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:24,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:24,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102908323] [2022-07-22 20:22:24,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102908323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:22:24,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300886891] [2022-07-22 20:22:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:24,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:22:24,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:22:24,683 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) [2022-07-22 20:22:24,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:22:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 20:22:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:22:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:22:25,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:22:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:22:25,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300886891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:22:25,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:22:25,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-22 20:22:25,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58845784] [2022-07-22 20:22:25,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:22:25,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 20:22:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 20:22:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:22:25,285 INFO L87 Difference]: Start difference. First operand 3606 states and 5378 transitions. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:29,552 INFO L93 Difference]: Finished difference Result 15471 states and 21123 transitions. [2022-07-22 20:22:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-22 20:22:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 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 [2022-07-22 20:22:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:29,584 INFO L225 Difference]: With dead ends: 15471 [2022-07-22 20:22:29,585 INFO L226 Difference]: Without dead ends: 14145 [2022-07-22 20:22:29,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1620, Invalid=8082, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 20:22:29,595 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 12213 mSDsluCounter, 5257 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12213 SdHoareTripleChecker+Valid, 6814 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:29,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12213 Valid, 6814 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:22:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14145 states. [2022-07-22 20:22:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14145 to 10087. [2022-07-22 20:22:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10085 states have (on average 1.3716410510659396) internal successors, (13833), 10086 states have internal predecessors, (13833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 13833 transitions. [2022-07-22 20:22:30,373 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 13833 transitions. Word has length 65 [2022-07-22 20:22:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:30,374 INFO L495 AbstractCegarLoop]: Abstraction has 10087 states and 13833 transitions. [2022-07-22 20:22:30,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 13833 transitions. [2022-07-22 20:22:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:22:30,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:30,375 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:30,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 20:22:30,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 20:22:30,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2022-07-22 20:22:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:30,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492650708] [2022-07-22 20:22:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:30,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:30,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492650708] [2022-07-22 20:22:30,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492650708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:22:30,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772456152] [2022-07-22 20:22:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:30,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:22:30,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:22:30,736 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) [2022-07-22 20:22:30,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:22:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:30,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 20:22:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:22:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:31,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:22:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:31,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772456152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:22:31,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:22:31,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-07-22 20:22:31,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106076678] [2022-07-22 20:22:31,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:22:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 20:22:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:31,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 20:22:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-22 20:22:31,708 INFO L87 Difference]: Start difference. First operand 10087 states and 13833 transitions. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:47,152 INFO L93 Difference]: Finished difference Result 123591 states and 160006 transitions. [2022-07-22 20:22:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-07-22 20:22:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 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 [2022-07-22 20:22:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:47,412 INFO L225 Difference]: With dead ends: 123591 [2022-07-22 20:22:47,412 INFO L226 Difference]: Without dead ends: 115784 [2022-07-22 20:22:47,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7739 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3290, Invalid=19060, Unknown=0, NotChecked=0, Total=22350 [2022-07-22 20:22:47,462 INFO L413 NwaCegarLoop]: 1623 mSDtfsCounter, 16068 mSDsluCounter, 9203 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16068 SdHoareTripleChecker+Valid, 10826 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:47,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16068 Valid, 10826 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:22:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115784 states. [2022-07-22 20:22:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115784 to 41017. [2022-07-22 20:22:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41017 states, 41015 states have (on average 1.3033768133609656) internal successors, (53458), 41016 states have internal predecessors, (53458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41017 states to 41017 states and 53458 transitions. [2022-07-22 20:22:52,603 INFO L78 Accepts]: Start accepts. Automaton has 41017 states and 53458 transitions. Word has length 66 [2022-07-22 20:22:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:52,604 INFO L495 AbstractCegarLoop]: Abstraction has 41017 states and 53458 transitions. [2022-07-22 20:22:52,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 41017 states and 53458 transitions. [2022-07-22 20:22:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:22:52,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:52,607 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:52,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:22:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 20:22:52,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2022-07-22 20:22:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663138399] [2022-07-22 20:22:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:22:52,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663138399] [2022-07-22 20:22:52,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663138399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:52,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:52,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:22:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322497865] [2022-07-22 20:22:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:52,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:22:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:22:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:22:52,851 INFO L87 Difference]: Start difference. First operand 41017 states and 53458 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) [2022-07-22 20:22:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:55,091 INFO L93 Difference]: Finished difference Result 59256 states and 76759 transitions. [2022-07-22 20:22:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:22:55,092 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 [2022-07-22 20:22:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:55,136 INFO L225 Difference]: With dead ends: 59256 [2022-07-22 20:22:55,137 INFO L226 Difference]: Without dead ends: 20519 [2022-07-22 20:22:55,175 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:55,176 INFO L413 NwaCegarLoop]: 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 [2022-07-22 20:22:55,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20519 states. [2022-07-22 20:22:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20519 to 19140. [2022-07-22 20:22:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19140 states, 19138 states have (on average 1.2918277771971993) internal successors, (24723), 19139 states have internal predecessors, (24723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:22:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19140 states to 19140 states and 24723 transitions. [2022-07-22 20:22:57,095 INFO L78 Accepts]: Start accepts. Automaton has 19140 states and 24723 transitions. Word has length 66 [2022-07-22 20:22:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:22:57,095 INFO L495 AbstractCegarLoop]: Abstraction has 19140 states and 24723 transitions. [2022-07-22 20:22:57,096 INFO L496 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) [2022-07-22 20:22:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 19140 states and 24723 transitions. [2022-07-22 20:22:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:22:57,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:22:57,097 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:22:57,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:22:57,098 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:22:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:22:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2022-07-22 20:22:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:22:57,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526348436] [2022-07-22 20:22:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:22:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:22:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:22:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:22:57,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:22:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526348436] [2022-07-22 20:22:57,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526348436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:22:57,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:22:57,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:22:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252405803] [2022-07-22 20:22:57,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:22:57,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:22:57,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:22:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:22:57,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:22:57,144 INFO L87 Difference]: Start difference. First operand 19140 states and 24723 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) [2022-07-22 20:22:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:22:58,934 INFO L93 Difference]: Finished difference Result 33283 states and 42594 transitions. [2022-07-22 20:22:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:22:58,935 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 [2022-07-22 20:22:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:22:58,952 INFO L225 Difference]: With dead ends: 33283 [2022-07-22 20:22:58,952 INFO L226 Difference]: Without dead ends: 16500 [2022-07-22 20:22:58,964 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:22:58,965 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4498 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:22:58,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4498 Valid, 2965 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:22:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16500 states. [2022-07-22 20:23:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16500 to 16500. [2022-07-22 20:23:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16500 states, 16498 states have (on average 1.2787004485392168) internal successors, (21096), 16499 states have internal predecessors, (21096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:23:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 21096 transitions. [2022-07-22 20:23:00,505 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 21096 transitions. Word has length 66 [2022-07-22 20:23:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:23:00,505 INFO L495 AbstractCegarLoop]: Abstraction has 16500 states and 21096 transitions. [2022-07-22 20:23:00,506 INFO L496 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) [2022-07-22 20:23:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 21096 transitions. [2022-07-22 20:23:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:23:00,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:23:00,507 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:23:00,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:23:00,507 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:23:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:23:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2022-07-22 20:23:00,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:23:00,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011732689] [2022-07-22 20:23:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:00,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:23:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 20:23:00,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:23:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011732689] [2022-07-22 20:23:00,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011732689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:23:00,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:23:00,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:23:00,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675963392] [2022-07-22 20:23:00,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:23:00,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:23:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:23:00,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:23:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:23:00,548 INFO L87 Difference]: Start difference. First operand 16500 states and 21096 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) [2022-07-22 20:23:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:23:01,795 INFO L93 Difference]: Finished difference Result 27043 states and 34123 transitions. [2022-07-22 20:23:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:23:01,796 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 [2022-07-22 20:23:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:23:01,808 INFO L225 Difference]: With dead ends: 27043 [2022-07-22 20:23:01,808 INFO L226 Difference]: Without dead ends: 12936 [2022-07-22 20:23:01,818 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:23:01,819 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4546 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4546 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:23:01,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4546 Valid, 2952 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:23:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12936 states. [2022-07-22 20:23:03,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12936 to 12936. [2022-07-22 20:23:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12936 states, 12934 states have (on average 1.2717643420442246) internal successors, (16449), 12935 states have internal predecessors, (16449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:23:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12936 states to 12936 states and 16449 transitions. [2022-07-22 20:23:03,044 INFO L78 Accepts]: Start accepts. Automaton has 12936 states and 16449 transitions. Word has length 66 [2022-07-22 20:23:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:23:03,045 INFO L495 AbstractCegarLoop]: Abstraction has 12936 states and 16449 transitions. [2022-07-22 20:23:03,045 INFO L496 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) [2022-07-22 20:23:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 12936 states and 16449 transitions. [2022-07-22 20:23:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 20:23:03,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:23:03,046 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:23:03,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:23:03,046 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:23:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:23:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2022-07-22 20:23:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:23:03,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010518641] [2022-07-22 20:23:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:23:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 20:23:03,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:23:03,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010518641] [2022-07-22 20:23:03,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010518641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:23:03,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:23:03,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:23:03,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839550968] [2022-07-22 20:23:03,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:23:03,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:23:03,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:23:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:23:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:23:03,089 INFO L87 Difference]: Start difference. First operand 12936 states and 16449 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) [2022-07-22 20:23:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:23:04,136 INFO L93 Difference]: Finished difference Result 21238 states and 26566 transitions. [2022-07-22 20:23:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:23:04,137 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 [2022-07-22 20:23:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:23:04,147 INFO L225 Difference]: With dead ends: 21238 [2022-07-22 20:23:04,147 INFO L226 Difference]: Without dead ends: 10618 [2022-07-22 20:23:04,154 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:23:04,155 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4551 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4551 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:23:04,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4551 Valid, 2950 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:23:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2022-07-22 20:23:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 10618. [2022-07-22 20:23:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10618 states, 10616 states have (on average 1.276186887716654) internal successors, (13548), 10617 states have internal predecessors, (13548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:23:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10618 states to 10618 states and 13548 transitions. [2022-07-22 20:23:05,208 INFO L78 Accepts]: Start accepts. Automaton has 10618 states and 13548 transitions. Word has length 66 [2022-07-22 20:23:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:23:05,208 INFO L495 AbstractCegarLoop]: Abstraction has 10618 states and 13548 transitions. [2022-07-22 20:23:05,208 INFO L496 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) [2022-07-22 20:23:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10618 states and 13548 transitions. [2022-07-22 20:23:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 20:23:05,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:23:05,210 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:23:05,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 20:23:05,210 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:23:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:23:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2022-07-22 20:23:05,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:23:05,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176474673] [2022-07-22 20:23:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:05,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:23:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:05,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:23:05,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176474673] [2022-07-22 20:23:05,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176474673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:23:05,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775540301] [2022-07-22 20:23:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:05,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:23:05,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:23:05,512 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) [2022-07-22 20:23:05,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:23:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 20:23:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:23:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:06,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:23:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:07,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775540301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:23:07,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:23:07,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2022-07-22 20:23:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751840721] [2022-07-22 20:23:07,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:23:07,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 20:23:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:23:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 20:23:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-07-22 20:23:07,584 INFO L87 Difference]: Start difference. First operand 10618 states and 13548 transitions. Second operand has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:23:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:23:17,308 INFO L93 Difference]: Finished difference Result 20046 states and 24677 transitions. [2022-07-22 20:23:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-22 20:23:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 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 [2022-07-22 20:23:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:23:17,326 INFO L225 Difference]: With dead ends: 20046 [2022-07-22 20:23:17,326 INFO L226 Difference]: Without dead ends: 14702 [2022-07-22 20:23:17,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3273 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1888, Invalid=9884, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 20:23:17,338 INFO L413 NwaCegarLoop]: 1728 mSDtfsCounter, 11641 mSDsluCounter, 27521 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11641 SdHoareTripleChecker+Valid, 29249 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 20:23:17,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11641 Valid, 29249 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 20:23:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14702 states. [2022-07-22 20:23:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14702 to 7692. [2022-07-22 20:23:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7690 states have (on average 1.3039011703511054) internal successors, (10027), 7691 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:23:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 10027 transitions. [2022-07-22 20:23:18,242 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 10027 transitions. Word has length 67 [2022-07-22 20:23:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:23:18,242 INFO L495 AbstractCegarLoop]: Abstraction has 7692 states and 10027 transitions. [2022-07-22 20:23:18,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:23:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 10027 transitions. [2022-07-22 20:23:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 20:23:18,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:23:18,244 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:23:18,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:23:18,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:23:18,444 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:23:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:23:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2022-07-22 20:23:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:23:18,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625505244] [2022-07-22 20:23:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:23:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:18,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:23:18,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625505244] [2022-07-22 20:23:18,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625505244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:23:18,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577305030] [2022-07-22 20:23:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:23:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:23:18,740 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) [2022-07-22 20:23:18,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 20:23:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:18,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 20:23:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:23:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:20,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:23:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:26,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577305030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:23:26,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:23:26,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24, 19] total 52 [2022-07-22 20:23:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43620255] [2022-07-22 20:23:26,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:23:26,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 20:23:26,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:23:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 20:23:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2355, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 20:23:26,350 INFO L87 Difference]: Start difference. First operand 7692 states and 10027 transitions. Second operand has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 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) [2022-07-22 20:23:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:23:35,952 INFO L93 Difference]: Finished difference Result 15501 states and 19190 transitions. [2022-07-22 20:23:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 20:23:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 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 [2022-07-22 20:23:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:23:35,964 INFO L225 Difference]: With dead ends: 15501 [2022-07-22 20:23:35,964 INFO L226 Difference]: Without dead ends: 12141 [2022-07-22 20:23:35,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4270 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2860, Invalid=14696, Unknown=0, NotChecked=0, Total=17556 [2022-07-22 20:23:35,971 INFO L413 NwaCegarLoop]: 1683 mSDtfsCounter, 28702 mSDsluCounter, 33909 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28702 SdHoareTripleChecker+Valid, 35592 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:23:35,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28702 Valid, 35592 Invalid, 2030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [244 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:23:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12141 states. [2022-07-22 20:23:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12141 to 6098. [2022-07-22 20:23:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6098 states, 6096 states have (on average 1.3298884514435696) internal successors, (8107), 6097 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:23:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 8107 transitions. [2022-07-22 20:23:36,755 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 8107 transitions. Word has length 68 [2022-07-22 20:23:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:23:36,756 INFO L495 AbstractCegarLoop]: Abstraction has 6098 states and 8107 transitions. [2022-07-22 20:23:36,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 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) [2022-07-22 20:23:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 8107 transitions. [2022-07-22 20:23:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 20:23:36,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:23:36,758 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:23:36,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 20:23:36,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:23:36,967 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:23:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:23:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 364136701, now seen corresponding path program 1 times [2022-07-22 20:23:36,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:23:36,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323861101] [2022-07-22 20:23:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:23:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:37,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:23:37,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323861101] [2022-07-22 20:23:37,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323861101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:23:37,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514658440] [2022-07-22 20:23:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:23:37,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:23:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:23:37,162 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) [2022-07-22 20:23:37,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 20:23:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:23:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 20:23:37,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:23:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:39,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:23:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:23:48,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514658440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:23:48,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:23:48,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 24, 23] total 55 [2022-07-22 20:23:48,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930781706] [2022-07-22 20:23:48,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:23:48,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 20:23:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:23:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 20:23:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2735, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 20:23:48,802 INFO L87 Difference]: Start difference. First operand 6098 states and 8107 transitions. Second operand has 55 states, 55 states have (on average 5.8) internal successors, (319), 55 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)