./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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.4.1.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 38d85b6b5a04cb96dc69842531ed31487f7945c34d1c701c72adfae91c235e8c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:43:44,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:43:44,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:43:44,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:43:44,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:43:44,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:43:44,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:43:44,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:43:44,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:43:44,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:43:44,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:43:44,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:43:44,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:43:44,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:43:44,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:43:44,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:43:44,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:43:44,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:43:44,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:43:44,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:43:44,412 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:43:44,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:43:44,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:43:44,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:43:44,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:43:44,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:43:44,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:43:44,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:43:44,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:43:44,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:43:44,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:43:44,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:43:44,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:43:44,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:43:44,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:43:44,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:43:44,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:43:44,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:43:44,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:43:44,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:43:44,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:43:44,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:43:44,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 07:43:44,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:43:44,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:43:44,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:43:44,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:43:44,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:43:44,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:43:44,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:43:44,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:43:44,475 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:43:44,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:43:44,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:43:44,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 07:43:44,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:43:44,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:43:44,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:43:44,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:43:44,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:43:44,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:43:44,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:43:44,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:43:44,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:43:44,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:43:44,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:43:44,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:43:44,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:43:44,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:43:44,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:43:44,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:43:44,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 07:43:44,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 07:43:44,480 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:43:44,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:43:44,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:43:44,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38d85b6b5a04cb96dc69842531ed31487f7945c34d1c701c72adfae91c235e8c [2022-07-21 07:43:44,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:43:44,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:43:44,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:43:44,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:43:44,786 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:43:44,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-21 07:43:44,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d868fa6e9/e61d6830f0b942ff95bac89f84a124bd/FLAG35be4ee4f [2022-07-21 07:43:45,575 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:43:45,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-21 07:43:45,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d868fa6e9/e61d6830f0b942ff95bac89f84a124bd/FLAG35be4ee4f [2022-07-21 07:43:45,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d868fa6e9/e61d6830f0b942ff95bac89f84a124bd [2022-07-21 07:43:45,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:43:45,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:43:45,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:43:45,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:43:45,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:43:45,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:43:45" (1/1) ... [2022-07-21 07:43:45,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0d8937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:45, skipping insertion in model container [2022-07-21 07:43:45,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:43:45" (1/1) ... [2022-07-21 07:43:45,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:43:45,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:43:46,221 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.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[8749,8762] [2022-07-21 07:43:46,261 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.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[15685,15698] [2022-07-21 07:43:46,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:43:46,883 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:43:46,928 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.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[8749,8762] [2022-07-21 07:43:46,940 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.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[15685,15698] [2022-07-21 07:43:47,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:43:47,401 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:43:47,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47 WrapperNode [2022-07-21 07:43:47,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:43:47,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:43:47,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:43:47,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:43:47,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:47,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:47,913 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5032 [2022-07-21 07:43:47,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:43:47,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:43:47,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:43:47,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:43:47,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:47,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:47,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:47,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:48,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:48,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:48,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:48,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:43:48,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:43:48,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:43:48,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:43:48,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (1/1) ... [2022-07-21 07:43:48,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:43:48,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:43:48,393 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) [2022-07-21 07:43:48,457 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 [2022-07-21 07:43:48,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:43:48,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 07:43:48,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:43:48,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:43:48,577 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:43:48,579 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:43:52,214 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:43:52,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:43:52,231 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 07:43:52,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:43:52 BoogieIcfgContainer [2022-07-21 07:43:52,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:43:52,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:43:52,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:43:52,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:43:52,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:43:45" (1/3) ... [2022-07-21 07:43:52,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360ae99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:43:52, skipping insertion in model container [2022-07-21 07:43:52,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:43:47" (2/3) ... [2022-07-21 07:43:52,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360ae99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:43:52, skipping insertion in model container [2022-07-21 07:43:52,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:43:52" (3/3) ... [2022-07-21 07:43:52,243 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-21 07:43:52,256 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:43:52,257 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:43:52,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:43:52,323 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@7a0234d6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26bf44ab [2022-07-21 07:43:52,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:43:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 07:43:52,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:52,342 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] [2022-07-21 07:43:52,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2022-07-21 07:43:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:52,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61902976] [2022-07-21 07:43:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:52,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:52,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61902976] [2022-07-21 07:43:52,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61902976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:52,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:52,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 07:43:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668838483] [2022-07-21 07:43:52,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:52,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 07:43:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 07:43:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:43:52,607 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 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 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:52,682 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2022-07-21 07:43:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 07:43:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-07-21 07:43:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:52,706 INFO L225 Difference]: With dead ends: 1759 [2022-07-21 07:43:52,707 INFO L226 Difference]: Without dead ends: 829 [2022-07-21 07:43:52,714 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 [2022-07-21 07:43:52,721 INFO L413 NwaCegarLoop]: 1627 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, 1627 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 [2022-07-21 07:43:52,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-21 07:43:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-07-21 07:43:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2022-07-21 07:43:52,796 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2022-07-21 07:43:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:52,797 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2022-07-21 07:43:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2022-07-21 07:43:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 07:43:52,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:52,799 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] [2022-07-21 07:43:52,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 07:43:52,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2022-07-21 07:43:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:52,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261137320] [2022-07-21 07:43:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:52,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261137320] [2022-07-21 07:43:52,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261137320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:52,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:52,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:43:52,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890309324] [2022-07-21 07:43:52,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:52,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 07:43:52,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:52,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 07:43:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 07:43:52,927 INFO L87 Difference]: Start difference. First operand 829 states and 1563 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:53,080 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2022-07-21 07:43:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 07:43:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-07-21 07:43:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:53,088 INFO L225 Difference]: With dead ends: 879 [2022-07-21 07:43:53,089 INFO L226 Difference]: Without dead ends: 829 [2022-07-21 07:43:53,090 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 [2022-07-21 07:43:53,091 INFO L413 NwaCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:43:53,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-21 07:43:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-07-21 07:43:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2022-07-21 07:43:53,119 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2022-07-21 07:43:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:53,119 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2022-07-21 07:43:53,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2022-07-21 07:43:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:43:53,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:53,130 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] [2022-07-21 07:43:53,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 07:43:53,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2022-07-21 07:43:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:53,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648048888] [2022-07-21 07:43:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:53,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:53,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648048888] [2022-07-21 07:43:53,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648048888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:53,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:53,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:43:53,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501983216] [2022-07-21 07:43:53,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:53,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:43:53,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:53,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:43:53,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:43:53,293 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:53,487 INFO L93 Difference]: Finished difference Result 1197 states and 2116 transitions. [2022-07-21 07:43:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 07:43:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-07-21 07:43:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:53,494 INFO L225 Difference]: With dead ends: 1197 [2022-07-21 07:43:53,494 INFO L226 Difference]: Without dead ends: 1151 [2022-07-21 07:43:53,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 07:43:53,504 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 07:43:53,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 07:43:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-07-21 07:43:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 873. [2022-07-21 07:43:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 871 states have (on average 1.8473019517795637) internal successors, (1609), 872 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1609 transitions. [2022-07-21 07:43:53,535 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1609 transitions. Word has length 52 [2022-07-21 07:43:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:53,536 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1609 transitions. [2022-07-21 07:43:53,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1609 transitions. [2022-07-21 07:43:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:43:53,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:53,539 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] [2022-07-21 07:43:53,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 07:43:53,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:53,543 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2022-07-21 07:43:53,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:53,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229770782] [2022-07-21 07:43:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:53,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:53,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:53,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229770782] [2022-07-21 07:43:53,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229770782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:53,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:53,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:43:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595247582] [2022-07-21 07:43:53,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:53,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:43:53,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:43:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:43:53,643 INFO L87 Difference]: Start difference. First operand 873 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:53,685 INFO L93 Difference]: Finished difference Result 1042 states and 1872 transitions. [2022-07-21 07:43:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:43:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-21 07:43:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:53,692 INFO L225 Difference]: With dead ends: 1042 [2022-07-21 07:43:53,692 INFO L226 Difference]: Without dead ends: 952 [2022-07-21 07:43:53,693 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 [2022-07-21 07:43:53,702 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:43:53,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-07-21 07:43:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 948. [2022-07-21 07:43:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8213530655391121) internal successors, (1723), 947 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1723 transitions. [2022-07-21 07:43:53,732 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1723 transitions. Word has length 54 [2022-07-21 07:43:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:53,733 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1723 transitions. [2022-07-21 07:43:53,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1723 transitions. [2022-07-21 07:43:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:43:53,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:53,734 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] [2022-07-21 07:43:53,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 07:43:53,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:53,735 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2022-07-21 07:43:53,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354448381] [2022-07-21 07:43:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:53,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:53,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354448381] [2022-07-21 07:43:53,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354448381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:53,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:53,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:43:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070903269] [2022-07-21 07:43:53,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:53,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:43:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:43:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:43:53,866 INFO L87 Difference]: Start difference. First operand 948 states and 1723 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:54,010 INFO L93 Difference]: Finished difference Result 1115 states and 1979 transitions. [2022-07-21 07:43:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:43:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-21 07:43:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:54,015 INFO L225 Difference]: With dead ends: 1115 [2022-07-21 07:43:54,016 INFO L226 Difference]: Without dead ends: 950 [2022-07-21 07:43:54,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-21 07:43:54,017 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 6048 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6048 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:43:54,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6048 Valid, 1744 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-07-21 07:43:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 948. [2022-07-21 07:43:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8192389006342495) internal successors, (1721), 947 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1721 transitions. [2022-07-21 07:43:54,050 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1721 transitions. Word has length 54 [2022-07-21 07:43:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:54,053 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1721 transitions. [2022-07-21 07:43:54,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1721 transitions. [2022-07-21 07:43:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:43:54,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:54,056 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] [2022-07-21 07:43:54,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 07:43:54,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2022-07-21 07:43:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:54,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003397740] [2022-07-21 07:43:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:54,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003397740] [2022-07-21 07:43:54,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003397740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:54,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:54,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:43:54,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165206320] [2022-07-21 07:43:54,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:54,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:43:54,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:43:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:43:54,106 INFO L87 Difference]: Start difference. First operand 948 states and 1721 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:54,145 INFO L93 Difference]: Finished difference Result 1254 states and 2187 transitions. [2022-07-21 07:43:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:43:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-21 07:43:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:54,150 INFO L225 Difference]: With dead ends: 1254 [2022-07-21 07:43:54,150 INFO L226 Difference]: Without dead ends: 1089 [2022-07-21 07:43:54,151 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 [2022-07-21 07:43:54,152 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 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 [2022-07-21 07:43:54,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-21 07:43:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2022-07-21 07:43:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1085 states have (on average 1.7778801843317973) internal successors, (1929), 1086 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1929 transitions. [2022-07-21 07:43:54,190 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1929 transitions. Word has length 54 [2022-07-21 07:43:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:54,191 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1929 transitions. [2022-07-21 07:43:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1929 transitions. [2022-07-21 07:43:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:43:54,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:54,192 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] [2022-07-21 07:43:54,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 07:43:54,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:54,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2022-07-21 07:43:54,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:54,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695543524] [2022-07-21 07:43:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:54,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:54,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695543524] [2022-07-21 07:43:54,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695543524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:54,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:54,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:43:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648749496] [2022-07-21 07:43:54,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:54,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:43:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:43:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:43:54,232 INFO L87 Difference]: Start difference. First operand 1087 states and 1929 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:54,284 INFO L93 Difference]: Finished difference Result 1647 states and 2771 transitions. [2022-07-21 07:43:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:43:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-21 07:43:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:54,291 INFO L225 Difference]: With dead ends: 1647 [2022-07-21 07:43:54,291 INFO L226 Difference]: Without dead ends: 1343 [2022-07-21 07:43:54,292 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 [2022-07-21 07:43:54,293 INFO L413 NwaCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 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 [2022-07-21 07:43:54,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-07-21 07:43:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1341. [2022-07-21 07:43:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1339 states have (on average 1.7184466019417475) internal successors, (2301), 1340 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2301 transitions. [2022-07-21 07:43:54,345 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2301 transitions. Word has length 54 [2022-07-21 07:43:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:54,345 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 2301 transitions. [2022-07-21 07:43:54,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2301 transitions. [2022-07-21 07:43:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:43:54,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:54,346 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] [2022-07-21 07:43:54,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 07:43:54,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:54,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2022-07-21 07:43:54,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:54,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802833778] [2022-07-21 07:43:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:54,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:54,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802833778] [2022-07-21 07:43:54,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802833778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:54,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:54,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:43:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871713467] [2022-07-21 07:43:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:54,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:43:54,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:43:54,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:43:54,382 INFO L87 Difference]: Start difference. First operand 1341 states and 2301 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:54,494 INFO L93 Difference]: Finished difference Result 2361 states and 3807 transitions. [2022-07-21 07:43:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:43:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-21 07:43:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:54,502 INFO L225 Difference]: With dead ends: 2361 [2022-07-21 07:43:54,502 INFO L226 Difference]: Without dead ends: 1803 [2022-07-21 07:43:54,503 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 [2022-07-21 07:43:54,504 INFO L413 NwaCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 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 [2022-07-21 07:43:54,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-07-21 07:43:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1801. [2022-07-21 07:43:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1799 states have (on average 1.6436909394107837) internal successors, (2957), 1800 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2957 transitions. [2022-07-21 07:43:54,572 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2957 transitions. Word has length 54 [2022-07-21 07:43:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:54,572 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 2957 transitions. [2022-07-21 07:43:54,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2957 transitions. [2022-07-21 07:43:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 07:43:54,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:54,574 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] [2022-07-21 07:43:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 07:43:54,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2022-07-21 07:43:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:54,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009535592] [2022-07-21 07:43:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:54,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:54,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009535592] [2022-07-21 07:43:54,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009535592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:54,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:54,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 07:43:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389090274] [2022-07-21 07:43:54,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 07:43:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 07:43:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 07:43:54,644 INFO L87 Difference]: Start difference. First operand 1801 states and 2957 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:54,860 INFO L93 Difference]: Finished difference Result 2571 states and 4058 transitions. [2022-07-21 07:43:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 07:43:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-07-21 07:43:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:54,871 INFO L225 Difference]: With dead ends: 2571 [2022-07-21 07:43:54,871 INFO L226 Difference]: Without dead ends: 2569 [2022-07-21 07:43:54,873 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 [2022-07-21 07:43:54,873 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 498 mSDsluCounter, 9002 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 10579 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:43:54,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 10579 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-07-21 07:43:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1849. [2022-07-21 07:43:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1847 states have (on average 1.6226312939902545) internal successors, (2997), 1848 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2997 transitions. [2022-07-21 07:43:54,976 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2997 transitions. Word has length 55 [2022-07-21 07:43:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:54,977 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2997 transitions. [2022-07-21 07:43:54,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2997 transitions. [2022-07-21 07:43:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 07:43:54,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:54,978 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] [2022-07-21 07:43:54,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 07:43:54,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2022-07-21 07:43:54,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824663121] [2022-07-21 07:43:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824663121] [2022-07-21 07:43:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824663121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:55,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:55,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:43:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211155391] [2022-07-21 07:43:55,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:55,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:43:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:43:55,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:43:55,009 INFO L87 Difference]: Start difference. First operand 1849 states and 2997 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:43:55,127 INFO L93 Difference]: Finished difference Result 2944 states and 4587 transitions. [2022-07-21 07:43:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:43:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-07-21 07:43:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:43:55,135 INFO L225 Difference]: With dead ends: 2944 [2022-07-21 07:43:55,136 INFO L226 Difference]: Without dead ends: 2333 [2022-07-21 07:43:55,137 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 [2022-07-21 07:43:55,138 INFO L413 NwaCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 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 [2022-07-21 07:43:55,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:43:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-07-21 07:43:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2331. [2022-07-21 07:43:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2329 states have (on average 1.5762129669386002) internal successors, (3671), 2330 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3671 transitions. [2022-07-21 07:43:55,268 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3671 transitions. Word has length 56 [2022-07-21 07:43:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:43:55,269 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 3671 transitions. [2022-07-21 07:43:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:43:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3671 transitions. [2022-07-21 07:43:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 07:43:55,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:43:55,270 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] [2022-07-21 07:43:55,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 07:43:55,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:43:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:43:55,271 INFO L85 PathProgramCache]: Analyzing trace with hash 238773285, now seen corresponding path program 1 times [2022-07-21 07:43:55,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:43:55,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962505292] [2022-07-21 07:43:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:43:55,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:43:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:43:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:43:55,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:43:55,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962505292] [2022-07-21 07:43:55,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962505292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:43:55,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:43:55,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:43:55,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158017405] [2022-07-21 07:43:55,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:43:55,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 07:43:55,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:43:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 07:43:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 07:43:55,371 INFO L87 Difference]: Start difference. First operand 2331 states and 3671 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) [2022-07-21 07:44:01,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:01,433 INFO L93 Difference]: Finished difference Result 4586 states and 7980 transitions. [2022-07-21 07:44:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 07:44:01,433 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 [2022-07-21 07:44:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:01,446 INFO L225 Difference]: With dead ends: 4586 [2022-07-21 07:44:01,447 INFO L226 Difference]: Without dead ends: 3833 [2022-07-21 07:44:01,448 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 [2022-07-21 07:44:01,449 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 2387 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2387 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:01,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2387 Valid, 794 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-07-21 07:44:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2022-07-21 07:44:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3833. [2022-07-21 07:44:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3831 states have (on average 1.5100495954058992) internal successors, (5785), 3832 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5785 transitions. [2022-07-21 07:44:01,615 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5785 transitions. Word has length 60 [2022-07-21 07:44:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:01,615 INFO L495 AbstractCegarLoop]: Abstraction has 3833 states and 5785 transitions. [2022-07-21 07:44:01,615 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) [2022-07-21 07:44:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5785 transitions. [2022-07-21 07:44:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:44:01,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:01,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 07:44:01,618 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2022-07-21 07:44:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:01,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821581842] [2022-07-21 07:44:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 07:44:01,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:01,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821581842] [2022-07-21 07:44:01,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821581842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:01,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:01,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:44:01,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403096484] [2022-07-21 07:44:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:01,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:44:01,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:44:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:44:01,692 INFO L87 Difference]: Start difference. First operand 3833 states and 5785 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2022-07-21 07:44:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:02,323 INFO L93 Difference]: Finished difference Result 10339 states and 15026 transitions. [2022-07-21 07:44:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:44:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 79 [2022-07-21 07:44:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:02,354 INFO L225 Difference]: With dead ends: 10339 [2022-07-21 07:44:02,354 INFO L226 Difference]: Without dead ends: 8793 [2022-07-21 07:44:02,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:44:02,359 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4794 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:02,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4794 Valid, 3360 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8793 states. [2022-07-21 07:44:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8793 to 5377. [2022-07-21 07:44:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 5375 states have (on average 1.4811162790697674) internal successors, (7961), 5376 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7961 transitions. [2022-07-21 07:44:02,776 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 7961 transitions. Word has length 79 [2022-07-21 07:44:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:02,777 INFO L495 AbstractCegarLoop]: Abstraction has 5377 states and 7961 transitions. [2022-07-21 07:44:02,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2022-07-21 07:44:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 7961 transitions. [2022-07-21 07:44:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:44:02,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:02,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:02,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 07:44:02,780 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2022-07-21 07:44:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:02,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407795645] [2022-07-21 07:44:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 07:44:02,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:02,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407795645] [2022-07-21 07:44:02,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407795645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:02,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:02,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:44:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233057259] [2022-07-21 07:44:02,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:02,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:44:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:44:02,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:44:02,857 INFO L87 Difference]: Start difference. First operand 5377 states and 7961 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:03,658 INFO L93 Difference]: Finished difference Result 11883 states and 17202 transitions. [2022-07-21 07:44:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:44:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 07:44:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:03,685 INFO L225 Difference]: With dead ends: 11883 [2022-07-21 07:44:03,685 INFO L226 Difference]: Without dead ends: 10337 [2022-07-21 07:44:03,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:44:03,693 INFO L413 NwaCegarLoop]: 1603 mSDtfsCounter, 4743 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4743 SdHoareTripleChecker+Valid, 3402 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:03,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4743 Valid, 3402 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10337 states. [2022-07-21 07:44:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10337 to 7697. [2022-07-21 07:44:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7695 states have (on average 1.456140350877193) internal successors, (11205), 7696 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 11205 transitions. [2022-07-21 07:44:04,188 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 11205 transitions. Word has length 79 [2022-07-21 07:44:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:04,188 INFO L495 AbstractCegarLoop]: Abstraction has 7697 states and 11205 transitions. [2022-07-21 07:44:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 11205 transitions. [2022-07-21 07:44:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:44:04,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:04,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:04,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 07:44:04,191 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2022-07-21 07:44:04,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:04,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608275893] [2022-07-21 07:44:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:04,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 07:44:04,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:04,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608275893] [2022-07-21 07:44:04,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608275893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:04,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:04,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:44:04,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921227160] [2022-07-21 07:44:04,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:04,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:44:04,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:44:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:44:04,250 INFO L87 Difference]: Start difference. First operand 7697 states and 11205 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:05,059 INFO L93 Difference]: Finished difference Result 13427 states and 19378 transitions. [2022-07-21 07:44:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:44:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 07:44:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:05,085 INFO L225 Difference]: With dead ends: 13427 [2022-07-21 07:44:05,085 INFO L226 Difference]: Without dead ends: 11881 [2022-07-21 07:44:05,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:44:05,093 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4774 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4774 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:05,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4774 Valid, 3394 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2022-07-21 07:44:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 9241. [2022-07-21 07:44:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9239 states have (on average 1.4483169174153048) internal successors, (13381), 9240 states have internal predecessors, (13381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13381 transitions. [2022-07-21 07:44:05,649 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13381 transitions. Word has length 79 [2022-07-21 07:44:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:05,649 INFO L495 AbstractCegarLoop]: Abstraction has 9241 states and 13381 transitions. [2022-07-21 07:44:05,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13381 transitions. [2022-07-21 07:44:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 07:44:05,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:05,652 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:05,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 07:44:05,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2022-07-21 07:44:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:05,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755797715] [2022-07-21 07:44:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:05,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:05,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755797715] [2022-07-21 07:44:05,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755797715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:05,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:05,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:44:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967418708] [2022-07-21 07:44:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:05,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:44:05,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:44:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:44:05,690 INFO L87 Difference]: Start difference. First operand 9241 states and 13381 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:06,091 INFO L93 Difference]: Finished difference Result 14167 states and 20398 transitions. [2022-07-21 07:44:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:44:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-07-21 07:44:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:06,107 INFO L225 Difference]: With dead ends: 14167 [2022-07-21 07:44:06,107 INFO L226 Difference]: Without dead ends: 7213 [2022-07-21 07:44:06,119 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 [2022-07-21 07:44:06,120 INFO L413 NwaCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 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 [2022-07-21 07:44:06,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2022-07-21 07:44:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 7211. [2022-07-21 07:44:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7209 states have (on average 1.4602580108198087) internal successors, (10527), 7210 states have internal predecessors, (10527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 10527 transitions. [2022-07-21 07:44:06,592 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 10527 transitions. Word has length 81 [2022-07-21 07:44:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:06,592 INFO L495 AbstractCegarLoop]: Abstraction has 7211 states and 10527 transitions. [2022-07-21 07:44:06,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 10527 transitions. [2022-07-21 07:44:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 07:44:06,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:06,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 07:44:06,595 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2022-07-21 07:44:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692728651] [2022-07-21 07:44:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:44:06,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692728651] [2022-07-21 07:44:06,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692728651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:06,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:06,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:44:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901688728] [2022-07-21 07:44:06,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:44:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:44:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:44:06,653 INFO L87 Difference]: Start difference. First operand 7211 states and 10527 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:07,229 INFO L93 Difference]: Finished difference Result 11573 states and 16740 transitions. [2022-07-21 07:44:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:44:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 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 81 [2022-07-21 07:44:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:07,246 INFO L225 Difference]: With dead ends: 11573 [2022-07-21 07:44:07,246 INFO L226 Difference]: Without dead ends: 10483 [2022-07-21 07:44:07,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:44:07,252 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 4760 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4760 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:07,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4760 Valid, 3379 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2022-07-21 07:44:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8299. [2022-07-21 07:44:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8299 states, 8297 states have (on average 1.4538989996384235) internal successors, (12063), 8298 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8299 states to 8299 states and 12063 transitions. [2022-07-21 07:44:07,723 INFO L78 Accepts]: Start accepts. Automaton has 8299 states and 12063 transitions. Word has length 81 [2022-07-21 07:44:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:07,723 INFO L495 AbstractCegarLoop]: Abstraction has 8299 states and 12063 transitions. [2022-07-21 07:44:07,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 8299 states and 12063 transitions. [2022-07-21 07:44:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 07:44:07,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:07,729 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:07,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 07:44:07,729 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2022-07-21 07:44:07,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:07,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319105675] [2022-07-21 07:44:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:07,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:07,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319105675] [2022-07-21 07:44:07,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319105675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:07,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:07,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:44:07,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411232256] [2022-07-21 07:44:07,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:07,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:44:07,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:07,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:44:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:44:07,780 INFO L87 Difference]: Start difference. First operand 8299 states and 12063 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:08,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:08,063 INFO L93 Difference]: Finished difference Result 11295 states and 16289 transitions. [2022-07-21 07:44:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:44:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-07-21 07:44:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:08,075 INFO L225 Difference]: With dead ends: 11295 [2022-07-21 07:44:08,075 INFO L226 Difference]: Without dead ends: 5309 [2022-07-21 07:44:08,082 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 [2022-07-21 07:44:08,083 INFO L413 NwaCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 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 [2022-07-21 07:44:08,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2022-07-21 07:44:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 5307. [2022-07-21 07:44:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5305 states have (on average 1.469368520263902) internal successors, (7795), 5306 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 7795 transitions. [2022-07-21 07:44:08,384 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 7795 transitions. Word has length 82 [2022-07-21 07:44:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:08,384 INFO L495 AbstractCegarLoop]: Abstraction has 5307 states and 7795 transitions. [2022-07-21 07:44:08,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 7795 transitions. [2022-07-21 07:44:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 07:44:08,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:08,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:08,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 07:44:08,387 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:08,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2022-07-21 07:44:08,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:08,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209369331] [2022-07-21 07:44:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:08,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:08,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209369331] [2022-07-21 07:44:08,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209369331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:08,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:08,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:44:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163702677] [2022-07-21 07:44:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:44:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:44:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:44:08,438 INFO L87 Difference]: Start difference. First operand 5307 states and 7795 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:08,635 INFO L93 Difference]: Finished difference Result 6807 states and 9887 transitions. [2022-07-21 07:44:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:44:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-07-21 07:44:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:08,645 INFO L225 Difference]: With dead ends: 6807 [2022-07-21 07:44:08,645 INFO L226 Difference]: Without dead ends: 3813 [2022-07-21 07:44:08,648 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 [2022-07-21 07:44:08,649 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 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 [2022-07-21 07:44:08,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-07-21 07:44:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3811. [2022-07-21 07:44:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3809 states have (on average 1.4919926489892361) internal successors, (5683), 3810 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 5683 transitions. [2022-07-21 07:44:08,817 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 5683 transitions. Word has length 82 [2022-07-21 07:44:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:08,818 INFO L495 AbstractCegarLoop]: Abstraction has 3811 states and 5683 transitions. [2022-07-21 07:44:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 5683 transitions. [2022-07-21 07:44:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 07:44:08,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:08,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:08,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 07:44:08,820 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:08,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2022-07-21 07:44:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:08,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030862336] [2022-07-21 07:44:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:08,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030862336] [2022-07-21 07:44:08,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030862336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:08,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:08,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:44:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090469680] [2022-07-21 07:44:08,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:08,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:44:08,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:44:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:44:08,860 INFO L87 Difference]: Start difference. First operand 3811 states and 5683 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:08,953 INFO L93 Difference]: Finished difference Result 4563 states and 6719 transitions. [2022-07-21 07:44:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:44:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-07-21 07:44:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:08,958 INFO L225 Difference]: With dead ends: 4563 [2022-07-21 07:44:08,958 INFO L226 Difference]: Without dead ends: 3065 [2022-07-21 07:44:08,960 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 [2022-07-21 07:44:08,961 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 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 [2022-07-21 07:44:08,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-07-21 07:44:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 3063. [2022-07-21 07:44:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3061 states have (on average 1.5151911140150278) internal successors, (4638), 3062 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4638 transitions. [2022-07-21 07:44:09,062 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4638 transitions. Word has length 82 [2022-07-21 07:44:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:09,063 INFO L495 AbstractCegarLoop]: Abstraction has 3063 states and 4638 transitions. [2022-07-21 07:44:09,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4638 transitions. [2022-07-21 07:44:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 07:44:09,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:09,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:09,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 07:44:09,065 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2022-07-21 07:44:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:09,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059136626] [2022-07-21 07:44:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:09,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059136626] [2022-07-21 07:44:09,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059136626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:44:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165688039] [2022-07-21 07:44:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:09,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:44:09,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:44:09,302 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) [2022-07-21 07:44:09,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 07:44:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:09,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 07:44:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:44:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:44:09,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:44:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:44:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165688039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:44:09,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:44:09,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-21 07:44:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445864041] [2022-07-21 07:44:09,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:44:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 07:44:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 07:44:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-21 07:44:09,908 INFO L87 Difference]: Start difference. First operand 3063 states and 4638 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:13,315 INFO L93 Difference]: Finished difference Result 12222 states and 16849 transitions. [2022-07-21 07:44:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-21 07:44:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 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 82 [2022-07-21 07:44:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:13,332 INFO L225 Difference]: With dead ends: 12222 [2022-07-21 07:44:13,332 INFO L226 Difference]: Without dead ends: 11472 [2022-07-21 07:44:13,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2022-07-21 07:44:13,337 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 19818 mSDsluCounter, 5136 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19818 SdHoareTripleChecker+Valid, 6683 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:13,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19818 Valid, 6683 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 07:44:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2022-07-21 07:44:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 8732. [2022-07-21 07:44:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8732 states, 8730 states have (on average 1.3626575028636885) internal successors, (11896), 8731 states have internal predecessors, (11896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8732 states to 8732 states and 11896 transitions. [2022-07-21 07:44:14,007 INFO L78 Accepts]: Start accepts. Automaton has 8732 states and 11896 transitions. Word has length 82 [2022-07-21 07:44:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:14,007 INFO L495 AbstractCegarLoop]: Abstraction has 8732 states and 11896 transitions. [2022-07-21 07:44:14,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 8732 states and 11896 transitions. [2022-07-21 07:44:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 07:44:14,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:14,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:14,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 07:44:14,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:44:14,225 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:14,226 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2022-07-21 07:44:14,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:14,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885393252] [2022-07-21 07:44:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:14,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:14,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885393252] [2022-07-21 07:44:14,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885393252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:44:14,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368484314] [2022-07-21 07:44:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:14,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:44:14,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:44:14,388 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) [2022-07-21 07:44:14,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 07:44:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 07:44:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:44:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:15,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:44:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:15,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368484314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:44:15,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:44:15,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 07:44:15,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880753807] [2022-07-21 07:44:15,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:44:15,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 07:44:15,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 07:44:15,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-21 07:44:15,559 INFO L87 Difference]: Start difference. First operand 8732 states and 11896 transitions. Second operand has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:18,361 INFO L93 Difference]: Finished difference Result 31590 states and 41442 transitions. [2022-07-21 07:44:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 07:44:18,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 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 83 [2022-07-21 07:44:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:18,397 INFO L225 Difference]: With dead ends: 31590 [2022-07-21 07:44:18,397 INFO L226 Difference]: Without dead ends: 25463 [2022-07-21 07:44:18,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-07-21 07:44:18,407 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 15465 mSDsluCounter, 5278 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15465 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:18,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15465 Valid, 6812 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 07:44:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25463 states. [2022-07-21 07:44:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25463 to 16639. [2022-07-21 07:44:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16639 states, 16637 states have (on average 1.3078680050489873) internal successors, (21759), 16638 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16639 states to 16639 states and 21759 transitions. [2022-07-21 07:44:19,914 INFO L78 Accepts]: Start accepts. Automaton has 16639 states and 21759 transitions. Word has length 83 [2022-07-21 07:44:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 16639 states and 21759 transitions. [2022-07-21 07:44:19,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 16639 states and 21759 transitions. [2022-07-21 07:44:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 07:44:19,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:19,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:19,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 07:44:20,127 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,SelfDestructingSolverStorable20 [2022-07-21 07:44:20,128 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:20,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1875749690, now seen corresponding path program 1 times [2022-07-21 07:44:20,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:20,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029750385] [2022-07-21 07:44:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:20,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:20,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:20,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029750385] [2022-07-21 07:44:20,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029750385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:44:20,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312830903] [2022-07-21 07:44:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:20,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:44:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:44:20,272 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) [2022-07-21 07:44:20,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 07:44:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 07:44:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:44:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:44:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:22,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312830903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:44:22,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:44:22,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-07-21 07:44:22,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967422869] [2022-07-21 07:44:22,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:44:22,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 07:44:22,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 07:44:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-21 07:44:22,306 INFO L87 Difference]: Start difference. First operand 16639 states and 21759 transitions. Second operand has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:35,097 INFO L93 Difference]: Finished difference Result 86435 states and 110966 transitions. [2022-07-21 07:44:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-21 07:44:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 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 83 [2022-07-21 07:44:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:35,205 INFO L225 Difference]: With dead ends: 86435 [2022-07-21 07:44:35,206 INFO L226 Difference]: Without dead ends: 73293 [2022-07-21 07:44:35,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3175 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1862, Invalid=8238, Unknown=0, NotChecked=0, Total=10100 [2022-07-21 07:44:35,227 INFO L413 NwaCegarLoop]: 1608 mSDtfsCounter, 14056 mSDsluCounter, 16419 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14056 SdHoareTripleChecker+Valid, 18027 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:35,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14056 Valid, 18027 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-21 07:44:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73293 states. [2022-07-21 07:44:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73293 to 39222. [2022-07-21 07:44:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39222 states, 39220 states have (on average 1.2736104028556858) internal successors, (49951), 39221 states have internal predecessors, (49951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39222 states to 39222 states and 49951 transitions. [2022-07-21 07:44:40,488 INFO L78 Accepts]: Start accepts. Automaton has 39222 states and 49951 transitions. Word has length 83 [2022-07-21 07:44:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:40,489 INFO L495 AbstractCegarLoop]: Abstraction has 39222 states and 49951 transitions. [2022-07-21 07:44:40,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 39222 states and 49951 transitions. [2022-07-21 07:44:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 07:44:40,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:40,491 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:40,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 07:44:40,715 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 [2022-07-21 07:44:40,715 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1855953112, now seen corresponding path program 1 times [2022-07-21 07:44:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:40,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544960330] [2022-07-21 07:44:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:40,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 07:44:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:40,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544960330] [2022-07-21 07:44:40,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544960330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:44:40,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:44:40,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:44:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884763268] [2022-07-21 07:44:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:44:40,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:44:40,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:44:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:44:40,798 INFO L87 Difference]: Start difference. First operand 39222 states and 49951 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:44:44,485 INFO L93 Difference]: Finished difference Result 66357 states and 84076 transitions. [2022-07-21 07:44:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:44:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 83 [2022-07-21 07:44:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:44:44,520 INFO L225 Difference]: With dead ends: 66357 [2022-07-21 07:44:44,520 INFO L226 Difference]: Without dead ends: 29531 [2022-07-21 07:44:44,542 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 [2022-07-21 07:44:44,542 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4607 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4607 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:44:44,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4607 Valid, 2980 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:44:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29531 states. [2022-07-21 07:44:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29531 to 28403. [2022-07-21 07:44:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28403 states, 28401 states have (on average 1.262596387451146) internal successors, (35859), 28402 states have internal predecessors, (35859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28403 states to 28403 states and 35859 transitions. [2022-07-21 07:44:48,315 INFO L78 Accepts]: Start accepts. Automaton has 28403 states and 35859 transitions. Word has length 83 [2022-07-21 07:44:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:44:48,316 INFO L495 AbstractCegarLoop]: Abstraction has 28403 states and 35859 transitions. [2022-07-21 07:44:48,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:44:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 28403 states and 35859 transitions. [2022-07-21 07:44:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 07:44:48,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:44:48,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:44:48,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 07:44:48,318 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:44:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:44:48,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1741675261, now seen corresponding path program 1 times [2022-07-21 07:44:48,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:44:48,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695106840] [2022-07-21 07:44:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:48,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:44:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:48,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:44:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695106840] [2022-07-21 07:44:48,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695106840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:44:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819555316] [2022-07-21 07:44:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:44:48,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:44:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:44:48,464 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) [2022-07-21 07:44:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 07:44:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:44:48,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 07:44:48,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:44:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:49,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:44:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:44:49,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819555316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:44:49,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:44:49,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 07:44:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762475903] [2022-07-21 07:44:49,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:44:49,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 07:44:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:44:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 07:44:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-21 07:44:49,631 INFO L87 Difference]: Start difference. First operand 28403 states and 35859 transitions. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:45:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:45:05,644 INFO L93 Difference]: Finished difference Result 127204 states and 156736 transitions. [2022-07-21 07:45:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 07:45:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 0 states have call successors, (0), 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 84 [2022-07-21 07:45:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:45:05,790 INFO L225 Difference]: With dead ends: 127204 [2022-07-21 07:45:05,790 INFO L226 Difference]: Without dead ends: 105556 [2022-07-21 07:45:05,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 07:45:05,815 INFO L413 NwaCegarLoop]: 1532 mSDtfsCounter, 14221 mSDsluCounter, 4881 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14221 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 07:45:05,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14221 Valid, 6413 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 07:45:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105556 states.