./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.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 5f3e3e9ccc5a5069122f9a5e86045d7e13172c8034d09d1e159c68b2e816764e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 20:44:44,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 20:44:44,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 20:44:44,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 20:44:44,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 20:44:44,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 20:44:44,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 20:44:44,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 20:44:44,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 20:44:44,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 20:44:44,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 20:44:44,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 20:44:44,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 20:44:44,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 20:44:44,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 20:44:44,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 20:44:44,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 20:44:44,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 20:44:44,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 20:44:44,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 20:44:44,118 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 20:44:44,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 20:44:44,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 20:44:44,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 20:44:44,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 20:44:44,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 20:44:44,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 20:44:44,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 20:44:44,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 20:44:44,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 20:44:44,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 20:44:44,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 20:44:44,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 20:44:44,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 20:44:44,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 20:44:44,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 20:44:44,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 20:44:44,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 20:44:44,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 20:44:44,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 20:44:44,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 20:44:44,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 20:44:44,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 20:44:44,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 20:44:44,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 20:44:44,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 20:44:44,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 20:44:44,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 20:44:44,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 20:44:44,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 20:44:44,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 20:44:44,148 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 20:44:44,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 20:44:44,148 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 20:44:44,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 20:44:44,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 20:44:44,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 20:44:44,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 20:44:44,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 20:44:44,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 20:44:44,150 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 20:44:44,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 20:44:44,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 20:44:44,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 20:44:44,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 20:44:44,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 20:44:44,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 20:44:44,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:44:44,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 20:44:44,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 20:44:44,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 20:44:44,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 20:44:44,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 20:44:44,152 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 20:44:44,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 20:44:44,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 20:44:44,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f3e3e9ccc5a5069122f9a5e86045d7e13172c8034d09d1e159c68b2e816764e [2022-07-13 20:44:44,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 20:44:44,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 20:44:44,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 20:44:44,340 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 20:44:44,340 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 20:44:44,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-07-13 20:44:44,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e867c4678/f4c108f2340249b7ba7b37dae767eb8e/FLAG181795147 [2022-07-13 20:44:44,926 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 20:44:44,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-07-13 20:44:44,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e867c4678/f4c108f2340249b7ba7b37dae767eb8e/FLAG181795147 [2022-07-13 20:44:45,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e867c4678/f4c108f2340249b7ba7b37dae767eb8e [2022-07-13 20:44:45,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 20:44:45,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 20:44:45,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 20:44:45,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 20:44:45,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 20:44:45,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:44:45" (1/1) ... [2022-07-13 20:44:45,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a5ea91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:45, skipping insertion in model container [2022-07-13 20:44:45,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:44:45" (1/1) ... [2022-07-13 20:44:45,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 20:44:45,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 20:44:45,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[6524,6537] [2022-07-13 20:44:45,764 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[13814,13827] [2022-07-13 20:44:46,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:44:46,232 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 20:44:46,269 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[6524,6537] [2022-07-13 20:44:46,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[13814,13827] [2022-07-13 20:44:46,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:44:46,591 INFO L208 MainTranslator]: Completed translation [2022-07-13 20:44:46,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46 WrapperNode [2022-07-13 20:44:46,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 20:44:46,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 20:44:46,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 20:44:46,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 20:44:46,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:46,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:46,918 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4974 [2022-07-13 20:44:46,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 20:44:46,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 20:44:46,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 20:44:46,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 20:44:46,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:46,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:47,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:47,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:47,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:47,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:47,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:47,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 20:44:47,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 20:44:47,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 20:44:47,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 20:44:47,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (1/1) ... [2022-07-13 20:44:47,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:44:47,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:44:47,356 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) [2022-07-13 20:44:47,374 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 [2022-07-13 20:44:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 20:44:47,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 20:44:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 20:44:47,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 20:44:47,493 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 20:44:47,501 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 20:44:50,458 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 20:44:50,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 20:44:50,469 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 20:44:50,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:44:50 BoogieIcfgContainer [2022-07-13 20:44:50,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 20:44:50,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 20:44:50,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 20:44:50,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 20:44:50,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 08:44:45" (1/3) ... [2022-07-13 20:44:50,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84e3fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:44:50, skipping insertion in model container [2022-07-13 20:44:50,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:44:46" (2/3) ... [2022-07-13 20:44:50,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84e3fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:44:50, skipping insertion in model container [2022-07-13 20:44:50,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:44:50" (3/3) ... [2022-07-13 20:44:50,478 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-07-13 20:44:50,488 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 20:44:50,488 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 20:44:50,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 20:44:50,545 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@4ae25f17, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6688af2e [2022-07-13 20:44:50,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 20:44:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 20:44:50,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:50,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:50,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2022-07-13 20:44:50,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:50,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636903176] [2022-07-13 20:44:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:50,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:50,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636903176] [2022-07-13 20:44:50,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636903176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:50,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:50,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 20:44:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129868551] [2022-07-13 20:44:50,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:50,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 20:44:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 20:44:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 20:44:50,790 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:50,856 INFO L93 Difference]: Finished difference Result 1732 states and 3290 transitions. [2022-07-13 20:44:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 20:44:50,858 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 20:44:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:50,871 INFO L225 Difference]: With dead ends: 1732 [2022-07-13 20:44:50,878 INFO L226 Difference]: Without dead ends: 812 [2022-07-13 20:44:50,883 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 [2022-07-13 20:44:50,885 INFO L413 NwaCegarLoop]: 1597 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:50,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-07-13 20:44:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-07-13 20:44:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2022-07-13 20:44:50,969 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2022-07-13 20:44:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:50,971 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2022-07-13 20:44:50,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2022-07-13 20:44:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 20:44:50,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:50,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:50,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 20:44:50,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:50,973 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2022-07-13 20:44:50,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:50,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524552913] [2022-07-13 20:44:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:50,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:51,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:51,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524552913] [2022-07-13 20:44:51,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524552913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:51,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:51,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:44:51,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940168384] [2022-07-13 20:44:51,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:51,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:44:51,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:44:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:44:51,039 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:51,174 INFO L93 Difference]: Finished difference Result 852 states and 1593 transitions. [2022-07-13 20:44:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:44:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 20:44:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:51,179 INFO L225 Difference]: With dead ends: 852 [2022-07-13 20:44:51,182 INFO L226 Difference]: Without dead ends: 812 [2022-07-13 20:44:51,183 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 [2022-07-13 20:44:51,184 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 3 mSDsluCounter, 4574 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:51,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-07-13 20:44:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-07-13 20:44:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2022-07-13 20:44:51,214 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2022-07-13 20:44:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:51,214 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2022-07-13 20:44:51,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2022-07-13 20:44:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 20:44:51,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:51,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:51,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 20:44:51,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2022-07-13 20:44:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:51,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588563785] [2022-07-13 20:44:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588563785] [2022-07-13 20:44:51,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588563785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:51,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:51,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:44:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725707463] [2022-07-13 20:44:51,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:51,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:44:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:44:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:44:51,302 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:51,324 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2022-07-13 20:44:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:44:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-13 20:44:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:51,328 INFO L225 Difference]: With dead ends: 878 [2022-07-13 20:44:51,328 INFO L226 Difference]: Without dead ends: 842 [2022-07-13 20:44:51,332 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 [2022-07-13 20:44:51,334 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:51,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-07-13 20:44:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2022-07-13 20:44:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2022-07-13 20:44:51,351 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2022-07-13 20:44:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:51,352 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2022-07-13 20:44:51,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2022-07-13 20:44:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 20:44:51,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:51,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 20:44:51,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2022-07-13 20:44:51,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:51,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643113405] [2022-07-13 20:44:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:51,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643113405] [2022-07-13 20:44:51,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643113405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:51,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:51,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:44:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482590222] [2022-07-13 20:44:51,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:51,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:44:51,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:44:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:44:51,414 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:51,506 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2022-07-13 20:44:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 20:44:51,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-13 20:44:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:51,511 INFO L225 Difference]: With dead ends: 1224 [2022-07-13 20:44:51,511 INFO L226 Difference]: Without dead ends: 1160 [2022-07-13 20:44:51,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:44:51,518 INFO L413 NwaCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:51,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-07-13 20:44:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2022-07-13 20:44:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2022-07-13 20:44:51,540 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2022-07-13 20:44:51,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:51,541 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2022-07-13 20:44:51,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,541 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2022-07-13 20:44:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 20:44:51,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:51,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:51,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 20:44:51,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2022-07-13 20:44:51,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:51,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237165337] [2022-07-13 20:44:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:51,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:51,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:51,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237165337] [2022-07-13 20:44:51,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237165337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:51,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:51,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:44:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781316851] [2022-07-13 20:44:51,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:51,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:44:51,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:44:51,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:44:51,617 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:51,644 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2022-07-13 20:44:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:44:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-13 20:44:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:51,648 INFO L225 Difference]: With dead ends: 1089 [2022-07-13 20:44:51,649 INFO L226 Difference]: Without dead ends: 963 [2022-07-13 20:44:51,649 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 [2022-07-13 20:44:51,650 INFO L413 NwaCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:51,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-07-13 20:44:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2022-07-13 20:44:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2022-07-13 20:44:51,673 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2022-07-13 20:44:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:51,676 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2022-07-13 20:44:51,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2022-07-13 20:44:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 20:44:51,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:51,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:51,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 20:44:51,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:51,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2022-07-13 20:44:51,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:51,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737661822] [2022-07-13 20:44:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:51,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:51,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737661822] [2022-07-13 20:44:51,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737661822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:51,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:51,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:44:51,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505502629] [2022-07-13 20:44:51,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:51,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:44:51,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:51,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:44:51,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:44:51,785 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:51,878 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2022-07-13 20:44:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:44:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-13 20:44:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:51,895 INFO L225 Difference]: With dead ends: 1146 [2022-07-13 20:44:51,895 INFO L226 Difference]: Without dead ends: 963 [2022-07-13 20:44:51,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:44:51,896 INFO L413 NwaCegarLoop]: 1529 mSDtfsCounter, 3002 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3002 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:51,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3002 Valid, 1636 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:44:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-07-13 20:44:51,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2022-07-13 20:44:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2022-07-13 20:44:51,921 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2022-07-13 20:44:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:51,921 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2022-07-13 20:44:51,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2022-07-13 20:44:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 20:44:51,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:51,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:51,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 20:44:51,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2022-07-13 20:44:51,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:51,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459204057] [2022-07-13 20:44:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:51,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:51,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:51,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459204057] [2022-07-13 20:44:51,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459204057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:51,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:51,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:44:51,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615440759] [2022-07-13 20:44:51,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:51,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:44:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:44:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:44:51,972 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:52,005 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2022-07-13 20:44:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:44:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-13 20:44:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:52,011 INFO L225 Difference]: With dead ends: 1291 [2022-07-13 20:44:52,011 INFO L226 Difference]: Without dead ends: 1108 [2022-07-13 20:44:52,013 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 [2022-07-13 20:44:52,013 INFO L413 NwaCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:52,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-07-13 20:44:52,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2022-07-13 20:44:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2022-07-13 20:44:52,071 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2022-07-13 20:44:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:52,071 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2022-07-13 20:44:52,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2022-07-13 20:44:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 20:44:52,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:52,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 20:44:52,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2022-07-13 20:44:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:52,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790240903] [2022-07-13 20:44:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:52,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:52,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790240903] [2022-07-13 20:44:52,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790240903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:52,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:52,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:44:52,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126265958] [2022-07-13 20:44:52,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:52,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:44:52,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:44:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:44:52,105 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:52,148 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2022-07-13 20:44:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:44:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-13 20:44:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:52,153 INFO L225 Difference]: With dead ends: 1690 [2022-07-13 20:44:52,154 INFO L226 Difference]: Without dead ends: 1362 [2022-07-13 20:44:52,155 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 [2022-07-13 20:44:52,155 INFO L413 NwaCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:52,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-07-13 20:44:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2022-07-13 20:44:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2022-07-13 20:44:52,203 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2022-07-13 20:44:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:52,204 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2022-07-13 20:44:52,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2022-07-13 20:44:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 20:44:52,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:52,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:52,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 20:44:52,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2022-07-13 20:44:52,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:52,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610855054] [2022-07-13 20:44:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:52,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:52,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:52,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610855054] [2022-07-13 20:44:52,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610855054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:52,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:52,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 20:44:52,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056423948] [2022-07-13 20:44:52,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:52,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 20:44:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 20:44:52,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:44:52,276 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:52,428 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2022-07-13 20:44:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 20:44:52,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-13 20:44:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:52,434 INFO L225 Difference]: With dead ends: 1883 [2022-07-13 20:44:52,435 INFO L226 Difference]: Without dead ends: 1881 [2022-07-13 20:44:52,435 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 [2022-07-13 20:44:52,436 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 424 mSDsluCounter, 8903 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 10434 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:52,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 10434 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-07-13 20:44:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2022-07-13 20:44:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2022-07-13 20:44:52,492 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2022-07-13 20:44:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:52,493 INFO L495 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2022-07-13 20:44:52,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2022-07-13 20:44:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 20:44:52,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:52,494 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, 1, 1, 1] [2022-07-13 20:44:52,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 20:44:52,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:52,495 INFO L85 PathProgramCache]: Analyzing trace with hash -523945775, now seen corresponding path program 1 times [2022-07-13 20:44:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:52,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132350120] [2022-07-13 20:44:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:52,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:52,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:52,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132350120] [2022-07-13 20:44:52,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132350120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:52,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:52,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:44:52,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321181004] [2022-07-13 20:44:52,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 20:44:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 20:44:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 20:44:52,542 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:57,672 INFO L93 Difference]: Finished difference Result 3663 states and 6661 transitions. [2022-07-13 20:44:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 20:44:57,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-13 20:44:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:57,680 INFO L225 Difference]: With dead ends: 3663 [2022-07-13 20:44:57,680 INFO L226 Difference]: Without dead ends: 2910 [2022-07-13 20:44:57,683 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 [2022-07-13 20:44:57,683 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 2335 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2335 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:57,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2335 Valid, 771 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-13 20:44:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2022-07-13 20:44:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2022-07-13 20:44:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2908 states have (on average 1.5357634112792298) internal successors, (4466), 2909 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4466 transitions. [2022-07-13 20:44:57,756 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4466 transitions. Word has length 63 [2022-07-13 20:44:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:57,757 INFO L495 AbstractCegarLoop]: Abstraction has 2910 states and 4466 transitions. [2022-07-13 20:44:57,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4466 transitions. [2022-07-13 20:44:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 20:44:57,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:57,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 20:44:57,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2022-07-13 20:44:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630172853] [2022-07-13 20:44:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 20:44:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630172853] [2022-07-13 20:44:57,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630172853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:57,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:57,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:44:57,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429001698] [2022-07-13 20:44:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:44:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:44:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:44:57,814 INFO L87 Difference]: Start difference. First operand 2910 states and 4466 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:57,997 INFO L93 Difference]: Finished difference Result 4938 states and 7314 transitions. [2022-07-13 20:44:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:44:57,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-13 20:44:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:58,009 INFO L225 Difference]: With dead ends: 4938 [2022-07-13 20:44:58,009 INFO L226 Difference]: Without dead ends: 4308 [2022-07-13 20:44:58,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:44:58,011 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 3075 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:58,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2022-07-13 20:44:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2022-07-13 20:44:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3536 states have (on average 1.5107466063348416) internal successors, (5342), 3537 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5342 transitions. [2022-07-13 20:44:58,118 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5342 transitions. Word has length 64 [2022-07-13 20:44:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:58,118 INFO L495 AbstractCegarLoop]: Abstraction has 3538 states and 5342 transitions. [2022-07-13 20:44:58,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:58,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5342 transitions. [2022-07-13 20:44:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 20:44:58,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:58,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 20:44:58,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2022-07-13 20:44:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:58,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335353938] [2022-07-13 20:44:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:58,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 20:44:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335353938] [2022-07-13 20:44:58,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335353938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:58,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:58,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:44:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443735959] [2022-07-13 20:44:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:44:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:44:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:44:58,179 INFO L87 Difference]: Start difference. First operand 3538 states and 5342 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:58,385 INFO L93 Difference]: Finished difference Result 5566 states and 8190 transitions. [2022-07-13 20:44:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:44:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-13 20:44:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:58,398 INFO L225 Difference]: With dead ends: 5566 [2022-07-13 20:44:58,399 INFO L226 Difference]: Without dead ends: 4936 [2022-07-13 20:44:58,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:44:58,402 INFO L413 NwaCegarLoop]: 1564 mSDtfsCounter, 3065 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:58,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3065 Valid, 3213 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2022-07-13 20:44:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2022-07-13 20:44:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4480 states have (on average 1.4834821428571427) internal successors, (6646), 4481 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6646 transitions. [2022-07-13 20:44:58,575 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6646 transitions. Word has length 64 [2022-07-13 20:44:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:58,576 INFO L495 AbstractCegarLoop]: Abstraction has 4482 states and 6646 transitions. [2022-07-13 20:44:58,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6646 transitions. [2022-07-13 20:44:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 20:44:58,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:58,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:58,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 20:44:58,577 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2022-07-13 20:44:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:58,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546143955] [2022-07-13 20:44:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 20:44:58,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546143955] [2022-07-13 20:44:58,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546143955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:58,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:58,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:44:58,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756855339] [2022-07-13 20:44:58,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:58,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:44:58,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:44:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:44:58,638 INFO L87 Difference]: Start difference. First operand 4482 states and 6646 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:58,871 INFO L93 Difference]: Finished difference Result 5834 states and 8570 transitions. [2022-07-13 20:44:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:44:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-13 20:44:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:58,902 INFO L225 Difference]: With dead ends: 5834 [2022-07-13 20:44:58,902 INFO L226 Difference]: Without dead ends: 5384 [2022-07-13 20:44:58,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:44:58,905 INFO L413 NwaCegarLoop]: 1562 mSDtfsCounter, 3066 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:58,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2022-07-13 20:44:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4930. [2022-07-13 20:44:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4768668831168832) internal successors, (7278), 4929 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7278 transitions. [2022-07-13 20:44:59,108 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7278 transitions. Word has length 64 [2022-07-13 20:44:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:59,109 INFO L495 AbstractCegarLoop]: Abstraction has 4930 states and 7278 transitions. [2022-07-13 20:44:59,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7278 transitions. [2022-07-13 20:44:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 20:44:59,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:59,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:59,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 20:44:59,114 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2022-07-13 20:44:59,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:59,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641632806] [2022-07-13 20:44:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:59,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:59,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641632806] [2022-07-13 20:44:59,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641632806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:59,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:59,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:44:59,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047955821] [2022-07-13 20:44:59,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:59,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:44:59,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:44:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:44:59,146 INFO L87 Difference]: Start difference. First operand 4930 states and 7278 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:59,309 INFO L93 Difference]: Finished difference Result 7582 states and 10980 transitions. [2022-07-13 20:44:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:44:59,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-13 20:44:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:59,317 INFO L225 Difference]: With dead ends: 7582 [2022-07-13 20:44:59,317 INFO L226 Difference]: Without dead ends: 4932 [2022-07-13 20:44:59,320 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 [2022-07-13 20:44:59,321 INFO L413 NwaCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:59,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2022-07-13 20:44:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4930. [2022-07-13 20:44:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4667207792207793) internal successors, (7228), 4929 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7228 transitions. [2022-07-13 20:44:59,573 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7228 transitions. Word has length 65 [2022-07-13 20:44:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:59,573 INFO L495 AbstractCegarLoop]: Abstraction has 4930 states and 7228 transitions. [2022-07-13 20:44:59,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7228 transitions. [2022-07-13 20:44:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 20:44:59,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:59,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:59,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 20:44:59,575 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2022-07-13 20:44:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:59,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458616418] [2022-07-13 20:44:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:44:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:44:59,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:44:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458616418] [2022-07-13 20:44:59,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458616418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:44:59,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:44:59,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:44:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010355936] [2022-07-13 20:44:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:44:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:44:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:44:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:44:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:44:59,613 INFO L87 Difference]: Start difference. First operand 4930 states and 7228 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:44:59,721 INFO L93 Difference]: Finished difference Result 6258 states and 9055 transitions. [2022-07-13 20:44:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:44:59,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-13 20:44:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:44:59,726 INFO L225 Difference]: With dead ends: 6258 [2022-07-13 20:44:59,726 INFO L226 Difference]: Without dead ends: 3608 [2022-07-13 20:44:59,730 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 [2022-07-13 20:44:59,731 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:44:59,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:44:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-07-13 20:44:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3606. [2022-07-13 20:44:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3604 states have (on average 1.4922308546059933) internal successors, (5378), 3605 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5378 transitions. [2022-07-13 20:44:59,824 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5378 transitions. Word has length 65 [2022-07-13 20:44:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:44:59,825 INFO L495 AbstractCegarLoop]: Abstraction has 3606 states and 5378 transitions. [2022-07-13 20:44:59,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:44:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5378 transitions. [2022-07-13 20:44:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 20:44:59,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:44:59,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:44:59,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 20:44:59,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:44:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:44:59,827 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2022-07-13 20:44:59,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:44:59,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169550093] [2022-07-13 20:44:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:44:59,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:44:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:00,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:00,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169550093] [2022-07-13 20:45:00,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169550093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:45:00,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432848534] [2022-07-13 20:45:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:00,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:45:00,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:45:00,027 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) [2022-07-13 20:45:00,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 20:45:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:00,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 20:45:00,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:45:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 20:45:00,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:45:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 20:45:00,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432848534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:45:00,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:45:00,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-13 20:45:00,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975340595] [2022-07-13 20:45:00,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:45:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 20:45:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:00,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 20:45:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-13 20:45:00,426 INFO L87 Difference]: Start difference. First operand 3606 states and 5378 transitions. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:45:03,863 INFO L93 Difference]: Finished difference Result 15471 states and 21123 transitions. [2022-07-13 20:45:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-13 20:45:03,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-13 20:45:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:45:03,886 INFO L225 Difference]: With dead ends: 15471 [2022-07-13 20:45:03,886 INFO L226 Difference]: Without dead ends: 14145 [2022-07-13 20:45:03,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3478 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1620, Invalid=8082, Unknown=0, NotChecked=0, Total=9702 [2022-07-13 20:45:03,894 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 12213 mSDsluCounter, 5257 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12213 SdHoareTripleChecker+Valid, 6814 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 20:45:03,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12213 Valid, 6814 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 20:45:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14145 states. [2022-07-13 20:45:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14145 to 10087. [2022-07-13 20:45:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10085 states have (on average 1.3716410510659396) internal successors, (13833), 10086 states have internal predecessors, (13833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 13833 transitions. [2022-07-13 20:45:04,484 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 13833 transitions. Word has length 65 [2022-07-13 20:45:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:45:04,484 INFO L495 AbstractCegarLoop]: Abstraction has 10087 states and 13833 transitions. [2022-07-13 20:45:04,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 13833 transitions. [2022-07-13 20:45:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 20:45:04,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:45:04,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:45:04,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 20:45:04,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 20:45:04,700 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:45:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:45:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2022-07-13 20:45:04,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:45:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247799471] [2022-07-13 20:45:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:45:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:04,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247799471] [2022-07-13 20:45:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247799471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:45:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951442707] [2022-07-13 20:45:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:04,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:45:04,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:45:04,834 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) [2022-07-13 20:45:04,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 20:45:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 20:45:04,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:45:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:05,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:45:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:05,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951442707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:45:05,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:45:05,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-07-13 20:45:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564594033] [2022-07-13 20:45:05,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:45:05,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 20:45:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 20:45:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-13 20:45:05,884 INFO L87 Difference]: Start difference. First operand 10087 states and 13833 transitions. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:45:22,131 INFO L93 Difference]: Finished difference Result 123591 states and 160006 transitions. [2022-07-13 20:45:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-07-13 20:45:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-13 20:45:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:45:22,352 INFO L225 Difference]: With dead ends: 123591 [2022-07-13 20:45:22,352 INFO L226 Difference]: Without dead ends: 115784 [2022-07-13 20:45:22,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7739 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3290, Invalid=19060, Unknown=0, NotChecked=0, Total=22350 [2022-07-13 20:45:22,397 INFO L413 NwaCegarLoop]: 1623 mSDtfsCounter, 16068 mSDsluCounter, 9203 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16068 SdHoareTripleChecker+Valid, 10826 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 20:45:22,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16068 Valid, 10826 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 20:45:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115784 states. [2022-07-13 20:45:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115784 to 41017. [2022-07-13 20:45:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41017 states, 41015 states have (on average 1.3033768133609656) internal successors, (53458), 41016 states have internal predecessors, (53458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41017 states to 41017 states and 53458 transitions. [2022-07-13 20:45:27,280 INFO L78 Accepts]: Start accepts. Automaton has 41017 states and 53458 transitions. Word has length 66 [2022-07-13 20:45:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:45:27,280 INFO L495 AbstractCegarLoop]: Abstraction has 41017 states and 53458 transitions. [2022-07-13 20:45:27,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41017 states and 53458 transitions. [2022-07-13 20:45:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 20:45:27,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:45:27,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:45:27,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 20:45:27,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 20:45:27,499 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:45:27,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:45:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2022-07-13 20:45:27,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:45:27,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503886205] [2022-07-13 20:45:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:45:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:27,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503886205] [2022-07-13 20:45:27,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503886205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:45:27,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:45:27,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:45:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451328944] [2022-07-13 20:45:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:45:27,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:45:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:45:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:45:27,528 INFO L87 Difference]: Start difference. First operand 41017 states and 53458 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:45:29,705 INFO L93 Difference]: Finished difference Result 59256 states and 76759 transitions. [2022-07-13 20:45:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:45:29,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-13 20:45:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:45:29,728 INFO L225 Difference]: With dead ends: 59256 [2022-07-13 20:45:29,728 INFO L226 Difference]: Without dead ends: 20519 [2022-07-13 20:45:29,757 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 [2022-07-13 20:45:29,758 INFO L413 NwaCegarLoop]: 1525 mSDtfsCounter, 17 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:45:29,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:45:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20519 states. [2022-07-13 20:45:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20519 to 19140. [2022-07-13 20:45:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19140 states, 19138 states have (on average 1.2918277771971993) internal successors, (24723), 19139 states have internal predecessors, (24723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19140 states to 19140 states and 24723 transitions. [2022-07-13 20:45:31,461 INFO L78 Accepts]: Start accepts. Automaton has 19140 states and 24723 transitions. Word has length 66 [2022-07-13 20:45:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:45:31,461 INFO L495 AbstractCegarLoop]: Abstraction has 19140 states and 24723 transitions. [2022-07-13 20:45:31,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 19140 states and 24723 transitions. [2022-07-13 20:45:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 20:45:31,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:45:31,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:45:31,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 20:45:31,463 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:45:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:45:31,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2022-07-13 20:45:31,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:45:31,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374556249] [2022-07-13 20:45:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:31,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:45:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 20:45:31,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374556249] [2022-07-13 20:45:31,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374556249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:45:31,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:45:31,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:45:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656415175] [2022-07-13 20:45:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:45:31,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:45:31,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:45:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:45:31,506 INFO L87 Difference]: Start difference. First operand 19140 states and 24723 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:45:33,430 INFO L93 Difference]: Finished difference Result 33283 states and 42594 transitions. [2022-07-13 20:45:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:45:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-13 20:45:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:45:33,449 INFO L225 Difference]: With dead ends: 33283 [2022-07-13 20:45:33,450 INFO L226 Difference]: Without dead ends: 16500 [2022-07-13 20:45:33,459 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 [2022-07-13 20:45:33,460 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4498 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:45:33,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4498 Valid, 2965 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:45:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16500 states. [2022-07-13 20:45:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16500 to 16500. [2022-07-13 20:45:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16500 states, 16498 states have (on average 1.2787004485392168) internal successors, (21096), 16499 states have internal predecessors, (21096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 21096 transitions. [2022-07-13 20:45:34,996 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 21096 transitions. Word has length 66 [2022-07-13 20:45:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:45:34,996 INFO L495 AbstractCegarLoop]: Abstraction has 16500 states and 21096 transitions. [2022-07-13 20:45:34,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 21096 transitions. [2022-07-13 20:45:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 20:45:34,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:45:34,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:45:34,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 20:45:34,998 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:45:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:45:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2022-07-13 20:45:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:45:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912596289] [2022-07-13 20:45:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:45:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 20:45:35,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:35,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912596289] [2022-07-13 20:45:35,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912596289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:45:35,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:45:35,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:45:35,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585148369] [2022-07-13 20:45:35,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:45:35,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:45:35,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:45:35,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:45:35,046 INFO L87 Difference]: Start difference. First operand 16500 states and 21096 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:45:36,326 INFO L93 Difference]: Finished difference Result 27043 states and 34123 transitions. [2022-07-13 20:45:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:45:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-13 20:45:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:45:36,342 INFO L225 Difference]: With dead ends: 27043 [2022-07-13 20:45:36,342 INFO L226 Difference]: Without dead ends: 12936 [2022-07-13 20:45:36,352 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 [2022-07-13 20:45:36,353 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4546 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4546 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:45:36,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4546 Valid, 2952 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:45:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12936 states. [2022-07-13 20:45:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12936 to 12936. [2022-07-13 20:45:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12936 states, 12934 states have (on average 1.2717643420442246) internal successors, (16449), 12935 states have internal predecessors, (16449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12936 states to 12936 states and 16449 transitions. [2022-07-13 20:45:37,643 INFO L78 Accepts]: Start accepts. Automaton has 12936 states and 16449 transitions. Word has length 66 [2022-07-13 20:45:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:45:37,643 INFO L495 AbstractCegarLoop]: Abstraction has 12936 states and 16449 transitions. [2022-07-13 20:45:37,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 12936 states and 16449 transitions. [2022-07-13 20:45:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 20:45:37,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:45:37,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:45:37,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 20:45:37,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:45:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:45:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2022-07-13 20:45:37,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:45:37,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756317753] [2022-07-13 20:45:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:37,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:45:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 20:45:37,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:37,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756317753] [2022-07-13 20:45:37,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756317753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:45:37,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:45:37,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:45:37,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919747737] [2022-07-13 20:45:37,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:45:37,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:45:37,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:37,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:45:37,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:45:37,680 INFO L87 Difference]: Start difference. First operand 12936 states and 16449 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:45:38,726 INFO L93 Difference]: Finished difference Result 21238 states and 26566 transitions. [2022-07-13 20:45:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:45:38,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-13 20:45:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:45:38,737 INFO L225 Difference]: With dead ends: 21238 [2022-07-13 20:45:38,738 INFO L226 Difference]: Without dead ends: 10618 [2022-07-13 20:45:38,747 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 [2022-07-13 20:45:38,748 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4551 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4551 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:45:38,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4551 Valid, 2950 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:45:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2022-07-13 20:45:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 10618. [2022-07-13 20:45:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10618 states, 10616 states have (on average 1.276186887716654) internal successors, (13548), 10617 states have internal predecessors, (13548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10618 states to 10618 states and 13548 transitions. [2022-07-13 20:45:39,883 INFO L78 Accepts]: Start accepts. Automaton has 10618 states and 13548 transitions. Word has length 66 [2022-07-13 20:45:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:45:39,883 INFO L495 AbstractCegarLoop]: Abstraction has 10618 states and 13548 transitions. [2022-07-13 20:45:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10618 states and 13548 transitions. [2022-07-13 20:45:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 20:45:39,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:45:39,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:45:39,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 20:45:39,884 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:45:39,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:45:39,885 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2022-07-13 20:45:39,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:45:39,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514166247] [2022-07-13 20:45:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:39,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:45:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:40,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:40,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514166247] [2022-07-13 20:45:40,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514166247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:45:40,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888691500] [2022-07-13 20:45:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:40,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:45:40,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:45:40,137 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) [2022-07-13 20:45:40,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 20:45:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 20:45:40,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:45:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:41,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:45:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888691500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:45:41,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:45:41,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2022-07-13 20:45:41,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128097481] [2022-07-13 20:45:41,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:45:41,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 20:45:41,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 20:45:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-07-13 20:45:41,870 INFO L87 Difference]: Start difference. First operand 10618 states and 13548 transitions. Second operand has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:45:51,312 INFO L93 Difference]: Finished difference Result 20046 states and 24677 transitions. [2022-07-13 20:45:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-13 20:45:51,313 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-13 20:45:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:45:51,326 INFO L225 Difference]: With dead ends: 20046 [2022-07-13 20:45:51,326 INFO L226 Difference]: Without dead ends: 14702 [2022-07-13 20:45:51,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3273 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1888, Invalid=9884, Unknown=0, NotChecked=0, Total=11772 [2022-07-13 20:45:51,332 INFO L413 NwaCegarLoop]: 1728 mSDtfsCounter, 11641 mSDsluCounter, 27521 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11641 SdHoareTripleChecker+Valid, 29249 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 20:45:51,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11641 Valid, 29249 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 20:45:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14702 states. [2022-07-13 20:45:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14702 to 7692. [2022-07-13 20:45:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7690 states have (on average 1.3039011703511054) internal successors, (10027), 7691 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 10027 transitions. [2022-07-13 20:45:52,225 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 10027 transitions. Word has length 67 [2022-07-13 20:45:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:45:52,225 INFO L495 AbstractCegarLoop]: Abstraction has 7692 states and 10027 transitions. [2022-07-13 20:45:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.903225806451613) internal successors, (183), 31 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:45:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 10027 transitions. [2022-07-13 20:45:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 20:45:52,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:45:52,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:45:52,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 20:45:52,427 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 [2022-07-13 20:45:52,427 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:45:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:45:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2022-07-13 20:45:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:45:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001284562] [2022-07-13 20:45:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:45:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:52,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:45:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001284562] [2022-07-13 20:45:52,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001284562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:45:52,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336774890] [2022-07-13 20:45:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:45:52,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:45:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:45:52,717 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) [2022-07-13 20:45:52,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 20:45:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:45:52,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 20:45:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:45:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:54,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:45:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:45:59,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336774890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:45:59,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:45:59,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24, 19] total 52 [2022-07-13 20:45:59,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293819704] [2022-07-13 20:45:59,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:45:59,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-13 20:45:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:45:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-13 20:45:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2355, Unknown=0, NotChecked=0, Total=2652 [2022-07-13 20:45:59,426 INFO L87 Difference]: Start difference. First operand 7692 states and 10027 transitions. Second operand has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:46:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:46:08,856 INFO L93 Difference]: Finished difference Result 15501 states and 19190 transitions. [2022-07-13 20:46:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-13 20:46:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-13 20:46:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:46:08,873 INFO L225 Difference]: With dead ends: 15501 [2022-07-13 20:46:08,874 INFO L226 Difference]: Without dead ends: 12141 [2022-07-13 20:46:08,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4270 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2860, Invalid=14696, Unknown=0, NotChecked=0, Total=17556 [2022-07-13 20:46:08,884 INFO L413 NwaCegarLoop]: 1683 mSDtfsCounter, 28702 mSDsluCounter, 33909 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28702 SdHoareTripleChecker+Valid, 35592 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:46:08,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28702 Valid, 35592 Invalid, 2030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [244 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 20:46:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12141 states. [2022-07-13 20:46:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12141 to 6098. [2022-07-13 20:46:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6098 states, 6096 states have (on average 1.3298884514435696) internal successors, (8107), 6097 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:46:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 8107 transitions. [2022-07-13 20:46:09,757 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 8107 transitions. Word has length 68 [2022-07-13 20:46:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:46:09,757 INFO L495 AbstractCegarLoop]: Abstraction has 6098 states and 8107 transitions. [2022-07-13 20:46:09,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:46:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 8107 transitions. [2022-07-13 20:46:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 20:46:09,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:46:09,768 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:46:09,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 20:46:09,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:46:09,983 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:46:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:46:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 364136701, now seen corresponding path program 1 times [2022-07-13 20:46:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:46:09,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044439045] [2022-07-13 20:46:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:46:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:46:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:46:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:46:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:46:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044439045] [2022-07-13 20:46:10,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044439045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:46:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806072829] [2022-07-13 20:46:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:46:10,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:46:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:46:10,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 20:46:10,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 20:46:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:46:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 20:46:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:46:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:46:12,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:46:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:46:20,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806072829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:46:20,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 20:46:20,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 24, 23] total 55 [2022-07-13 20:46:20,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576092462] [2022-07-13 20:46:20,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 20:46:20,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-13 20:46:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:46:20,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-13 20:46:20,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2735, Unknown=0, NotChecked=0, Total=2970 [2022-07-13 20:46:20,519 INFO L87 Difference]: Start difference. First operand 6098 states and 8107 transitions. Second operand has 55 states, 55 states have (on average 5.8) internal successors, (319), 55 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:48:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:48:36,807 INFO L93 Difference]: Finished difference Result 18477 states and 22504 transitions. [2022-07-13 20:48:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 457 states. [2022-07-13 20:48:36,807 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.8) internal successors, (319), 55 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-13 20:48:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:48:36,825 INFO L225 Difference]: With dead ends: 18477 [2022-07-13 20:48:36,825 INFO L226 Difference]: Without dead ends: 16387 [2022-07-13 20:48:36,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107298 ImplicationChecksByTransitivity, 126.4s TimeCoverageRelationStatistics Valid=18586, Invalid=241004, Unknown=0, NotChecked=0, Total=259590 [2022-07-13 20:48:36,842 INFO L413 NwaCegarLoop]: 1797 mSDtfsCounter, 29465 mSDsluCounter, 37107 mSDsCounter, 0 mSdLazyCounter, 6264 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29465 SdHoareTripleChecker+Valid, 38904 SdHoareTripleChecker+Invalid, 7736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 6264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:48:36,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29465 Valid, 38904 Invalid, 7736 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1472 Valid, 6264 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-07-13 20:48:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16387 states. [2022-07-13 20:48:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16387 to 8328. [2022-07-13 20:48:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8328 states, 8326 states have (on average 1.288974297381696) internal successors, (10732), 8327 states have internal predecessors, (10732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:48:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 10732 transitions. [2022-07-13 20:48:38,377 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 10732 transitions. Word has length 113 [2022-07-13 20:48:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:48:38,377 INFO L495 AbstractCegarLoop]: Abstraction has 8328 states and 10732 transitions. [2022-07-13 20:48:38,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.8) internal successors, (319), 55 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:48:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 10732 transitions. [2022-07-13 20:48:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 20:48:38,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:48:38,379 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:48:38,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 20:48:38,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 20:48:38,598 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:48:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:48:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 532085968, now seen corresponding path program 1 times [2022-07-13 20:48:38,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:48:38,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131827455] [2022-07-13 20:48:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:48:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:48:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:48:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:48:38,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:48:38,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131827455] [2022-07-13 20:48:38,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131827455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:48:38,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123369137] [2022-07-13 20:48:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:48:38,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:48:38,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:48:38,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 20:48:38,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 20:48:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:48:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 20:48:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates...