./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1d9709d5a0621fd4bc0599bfe40ccbc8c215c029862756c658cfcd57bd9db9f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:08:39,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:08:39,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:08:40,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:08:40,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:08:40,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:08:40,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:08:40,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:08:40,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:08:40,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:08:40,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:08:40,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:08:40,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:08:40,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:08:40,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:08:40,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:08:40,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:08:40,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:08:40,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:08:40,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:08:40,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:08:40,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:08:40,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:08:40,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:08:40,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:08:40,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:08:40,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:08:40,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:08:40,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:08:40,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:08:40,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:08:40,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:08:40,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:08:40,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:08:40,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:08:40,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:08:40,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:08:40,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:08:40,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:08:40,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:08:40,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:08:40,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:08:40,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:08:40,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:08:40,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:08:40,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:08:40,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:08:40,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:08:40,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:08:40,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:08:40,124 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:08:40,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:08:40,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:08:40,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:08:40,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:08:40,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:08:40,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:08:40,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:08:40,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:08:40,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:08:40,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:08:40,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:08:40,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:08:40,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:08:40,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:08:40,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:08:40,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:08:40,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:08:40,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:08:40,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:08:40,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:08:40,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:08:40,128 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:08:40,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:08:40,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:08:40,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:08:40,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1d9709d5a0621fd4bc0599bfe40ccbc8c215c029862756c658cfcd57bd9db9f [2021-12-15 12:08:40,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:08:40,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:08:40,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:08:40,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:08:40,373 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:08:40,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-15 12:08:40,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c33e986/5387725793e54b3ab450daa3e3262585/FLAGf0811aaae [2021-12-15 12:08:40,999 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:08:41,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-15 12:08:41,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c33e986/5387725793e54b3ab450daa3e3262585/FLAGf0811aaae [2021-12-15 12:08:41,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c33e986/5387725793e54b3ab450daa3e3262585 [2021-12-15 12:08:41,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:08:41,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:08:41,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:08:41,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:08:41,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:08:41,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:08:41" (1/1) ... [2021-12-15 12:08:41,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b901d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:41, skipping insertion in model container [2021-12-15 12:08:41,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:08:41" (1/1) ... [2021-12-15 12:08:41,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:08:41,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:08:41,872 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15510,15523] [2021-12-15 12:08:41,888 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17847,17860] [2021-12-15 12:08:42,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:08:42,405 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:08:42,444 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15510,15523] [2021-12-15 12:08:42,448 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17847,17860] [2021-12-15 12:08:42,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:08:42,757 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:08:42,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42 WrapperNode [2021-12-15 12:08:42,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:08:42,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:08:42,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:08:42,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:08:42,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:42,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,096 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5147 [2021-12-15 12:08:43,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:08:43,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:08:43,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:08:43,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:08:43,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:08:43,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:08:43,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:08:43,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:08:43,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (1/1) ... [2021-12-15 12:08:43,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:08:43,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:08:43,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:08:43,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 12:08:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:08:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:08:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:08:43,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:08:43,705 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:08:43,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:08:46,337 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:08:46,355 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:08:46,356 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:08:46,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:08:46 BoogieIcfgContainer [2021-12-15 12:08:46,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:08:46,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:08:46,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:08:46,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:08:46,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:08:41" (1/3) ... [2021-12-15 12:08:46,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c82504a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:08:46, skipping insertion in model container [2021-12-15 12:08:46,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:08:42" (2/3) ... [2021-12-15 12:08:46,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c82504a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:08:46, skipping insertion in model container [2021-12-15 12:08:46,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:08:46" (3/3) ... [2021-12-15 12:08:46,365 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-15 12:08:46,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:08:46,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:08:46,411 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:08:46,416 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:08:46,416 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:08:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 12:08:46,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:46,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:46,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:46,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1041827451, now seen corresponding path program 1 times [2021-12-15 12:08:46,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:46,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191918713] [2021-12-15 12:08:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:46,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:46,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:46,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191918713] [2021-12-15 12:08:46,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191918713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:46,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:46,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:08:46,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901531936] [2021-12-15 12:08:46,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:46,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:46,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:46,629 INFO L87 Difference]: Start difference. First operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:49,907 INFO L93 Difference]: Finished difference Result 2563 states and 4924 transitions. [2021-12-15 12:08:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 12:08:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:49,927 INFO L225 Difference]: With dead ends: 2563 [2021-12-15 12:08:49,928 INFO L226 Difference]: Without dead ends: 1613 [2021-12-15 12:08:49,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:49,937 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 999 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:49,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 667 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 12:08:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-15 12:08:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-12-15 12:08:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6449410304158907) internal successors, (2650), 1612 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2650 transitions. [2021-12-15 12:08:50,045 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2650 transitions. Word has length 20 [2021-12-15 12:08:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:50,046 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2650 transitions. [2021-12-15 12:08:50,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2650 transitions. [2021-12-15 12:08:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 12:08:50,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:50,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:50,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:08:50,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2021-12-15 12:08:50,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:50,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530082601] [2021-12-15 12:08:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:50,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:50,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:50,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530082601] [2021-12-15 12:08:50,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530082601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:50,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:50,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:08:50,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022881475] [2021-12-15 12:08:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:50,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:08:50,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:08:50,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:08:50,148 INFO L87 Difference]: Start difference. First operand 1613 states and 2650 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:50,257 INFO L93 Difference]: Finished difference Result 1679 states and 2752 transitions. [2021-12-15 12:08:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:08:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-15 12:08:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:50,264 INFO L225 Difference]: With dead ends: 1679 [2021-12-15 12:08:50,265 INFO L226 Difference]: Without dead ends: 1613 [2021-12-15 12:08:50,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:08:50,271 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 3 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:50,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-15 12:08:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-12-15 12:08:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6201117318435754) internal successors, (2610), 1612 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2610 transitions. [2021-12-15 12:08:50,314 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2610 transitions. Word has length 38 [2021-12-15 12:08:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:50,314 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2610 transitions. [2021-12-15 12:08:50,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2610 transitions. [2021-12-15 12:08:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:50,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:50,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:50,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:08:50,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2021-12-15 12:08:50,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:50,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111045213] [2021-12-15 12:08:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:50,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:50,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:50,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111045213] [2021-12-15 12:08:50,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111045213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:50,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:50,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:50,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227896133] [2021-12-15 12:08:50,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:50,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:50,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,424 INFO L87 Difference]: Start difference. First operand 1613 states and 2610 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:50,449 INFO L93 Difference]: Finished difference Result 1731 states and 2796 transitions. [2021-12-15 12:08:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:50,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 12:08:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:50,456 INFO L225 Difference]: With dead ends: 1731 [2021-12-15 12:08:50,456 INFO L226 Difference]: Without dead ends: 1669 [2021-12-15 12:08:50,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,458 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1523 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:50,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1751 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-12-15 12:08:50,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1667. [2021-12-15 12:08:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.6192192192192192) internal successors, (2696), 1666 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2696 transitions. [2021-12-15 12:08:50,522 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2696 transitions. Word has length 77 [2021-12-15 12:08:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:50,522 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2696 transitions. [2021-12-15 12:08:50,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2696 transitions. [2021-12-15 12:08:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:50,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:50,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:50,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:08:50,540 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2021-12-15 12:08:50,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:50,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745919488] [2021-12-15 12:08:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:50,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:50,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745919488] [2021-12-15 12:08:50,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745919488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:50,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496385439] [2021-12-15 12:08:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:50,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,615 INFO L87 Difference]: Start difference. First operand 1667 states and 2696 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:50,645 INFO L93 Difference]: Finished difference Result 1887 states and 3044 transitions. [2021-12-15 12:08:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 12:08:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:50,653 INFO L225 Difference]: With dead ends: 1887 [2021-12-15 12:08:50,654 INFO L226 Difference]: Without dead ends: 1771 [2021-12-15 12:08:50,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,661 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 1519 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:50,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 1750 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-12-15 12:08:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2021-12-15 12:08:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6168647425014149) internal successors, (2857), 1768 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2857 transitions. [2021-12-15 12:08:50,710 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2857 transitions. Word has length 77 [2021-12-15 12:08:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:50,711 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2857 transitions. [2021-12-15 12:08:50,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2857 transitions. [2021-12-15 12:08:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:50,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:50,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:50,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:08:50,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2021-12-15 12:08:50,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:50,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902584197] [2021-12-15 12:08:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:50,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:50,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902584197] [2021-12-15 12:08:50,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902584197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:50,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:50,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:50,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859804410] [2021-12-15 12:08:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:50,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,813 INFO L87 Difference]: Start difference. First operand 1769 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:50,849 INFO L93 Difference]: Finished difference Result 2181 states and 3507 transitions. [2021-12-15 12:08:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:50,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 12:08:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:50,858 INFO L225 Difference]: With dead ends: 2181 [2021-12-15 12:08:50,858 INFO L226 Difference]: Without dead ends: 1963 [2021-12-15 12:08:50,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,860 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 1515 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:50,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-12-15 12:08:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2021-12-15 12:08:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1959 states have (on average 1.6115364982133742) internal successors, (3157), 1960 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3157 transitions. [2021-12-15 12:08:50,905 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3157 transitions. Word has length 77 [2021-12-15 12:08:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:50,905 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3157 transitions. [2021-12-15 12:08:50,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3157 transitions. [2021-12-15 12:08:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:50,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:50,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:50,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:08:50,907 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2021-12-15 12:08:50,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356520052] [2021-12-15 12:08:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:50,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:50,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356520052] [2021-12-15 12:08:50,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356520052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:50,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:50,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:50,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656941827] [2021-12-15 12:08:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:50,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:50,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,952 INFO L87 Difference]: Start difference. First operand 1961 states and 3157 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:50,987 INFO L93 Difference]: Finished difference Result 2733 states and 4367 transitions. [2021-12-15 12:08:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:50,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 12:08:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:50,995 INFO L225 Difference]: With dead ends: 2733 [2021-12-15 12:08:50,996 INFO L226 Difference]: Without dead ends: 2323 [2021-12-15 12:08:50,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:50,998 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1511 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:50,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1748 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-12-15 12:08:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2321. [2021-12-15 12:08:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2319 states have (on average 1.6011211729193617) internal successors, (3713), 2320 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3713 transitions. [2021-12-15 12:08:51,047 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3713 transitions. Word has length 77 [2021-12-15 12:08:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:51,047 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3713 transitions. [2021-12-15 12:08:51,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3713 transitions. [2021-12-15 12:08:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:51,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:51,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:51,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:08:51,049 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2021-12-15 12:08:51,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646138006] [2021-12-15 12:08:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:51,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:51,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:51,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646138006] [2021-12-15 12:08:51,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646138006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:51,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:51,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:51,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222479568] [2021-12-15 12:08:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:51,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:51,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:51,088 INFO L87 Difference]: Start difference. First operand 2321 states and 3713 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:51,129 INFO L93 Difference]: Finished difference Result 3765 states and 5955 transitions. [2021-12-15 12:08:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:51,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 12:08:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:51,139 INFO L225 Difference]: With dead ends: 3765 [2021-12-15 12:08:51,139 INFO L226 Difference]: Without dead ends: 2995 [2021-12-15 12:08:51,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:51,142 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 1507 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:51,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1747 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-12-15 12:08:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2993. [2021-12-15 12:08:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2991 states have (on average 1.583751253761284) internal successors, (4737), 2992 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4737 transitions. [2021-12-15 12:08:51,246 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4737 transitions. Word has length 77 [2021-12-15 12:08:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:51,246 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4737 transitions. [2021-12-15 12:08:51,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4737 transitions. [2021-12-15 12:08:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:51,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:51,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:51,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:08:51,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2021-12-15 12:08:51,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590552256] [2021-12-15 12:08:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:51,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:51,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:51,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590552256] [2021-12-15 12:08:51,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590552256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:51,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:51,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861238049] [2021-12-15 12:08:51,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:51,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:51,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:51,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:51,356 INFO L87 Difference]: Start difference. First operand 2993 states and 4737 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:52,086 INFO L93 Difference]: Finished difference Result 20297 states and 31437 transitions. [2021-12-15 12:08:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 12:08:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-15 12:08:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:52,176 INFO L225 Difference]: With dead ends: 20297 [2021-12-15 12:08:52,176 INFO L226 Difference]: Without dead ends: 18855 [2021-12-15 12:08:52,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-15 12:08:52,193 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 10553 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10553 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:52,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10553 Valid, 3392 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18855 states. [2021-12-15 12:08:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18855 to 4433. [2021-12-15 12:08:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4431 states have (on average 1.5565335138794854) internal successors, (6897), 4432 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 6897 transitions. [2021-12-15 12:08:52,593 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 6897 transitions. Word has length 77 [2021-12-15 12:08:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:52,594 INFO L470 AbstractCegarLoop]: Abstraction has 4433 states and 6897 transitions. [2021-12-15 12:08:52,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 6897 transitions. [2021-12-15 12:08:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:52,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:52,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:52,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:08:52,596 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:52,596 INFO L85 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2021-12-15 12:08:52,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:52,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115117178] [2021-12-15 12:08:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:52,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:52,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:52,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115117178] [2021-12-15 12:08:52,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115117178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:52,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:52,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:52,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197862993] [2021-12-15 12:08:52,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:52,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:52,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:52,653 INFO L87 Difference]: Start difference. First operand 4433 states and 6897 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:52,812 INFO L93 Difference]: Finished difference Result 9845 states and 15059 transitions. [2021-12-15 12:08:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-15 12:08:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:52,828 INFO L225 Difference]: With dead ends: 9845 [2021-12-15 12:08:52,828 INFO L226 Difference]: Without dead ends: 6963 [2021-12-15 12:08:52,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:52,837 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1498 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:52,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1671 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6963 states. [2021-12-15 12:08:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6963 to 6897. [2021-12-15 12:08:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.5154459753444525) internal successors, (10449), 6896 states have internal predecessors, (10449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10449 transitions. [2021-12-15 12:08:53,086 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10449 transitions. Word has length 79 [2021-12-15 12:08:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10449 transitions. [2021-12-15 12:08:53,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10449 transitions. [2021-12-15 12:08:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:53,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:53,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:53,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:08:53,091 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2021-12-15 12:08:53,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:53,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088909042] [2021-12-15 12:08:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:53,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:53,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:53,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088909042] [2021-12-15 12:08:53,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088909042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:53,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:53,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:53,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019238366] [2021-12-15 12:08:53,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:53,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:53,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:53,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:53,276 INFO L87 Difference]: Start difference. First operand 6897 states and 10449 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:53,744 INFO L93 Difference]: Finished difference Result 12245 states and 18387 transitions. [2021-12-15 12:08:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-15 12:08:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:53,759 INFO L225 Difference]: With dead ends: 12245 [2021-12-15 12:08:53,760 INFO L226 Difference]: Without dead ends: 6899 [2021-12-15 12:08:53,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-15 12:08:53,768 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 7790 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7790 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:53,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7790 Valid, 2048 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-12-15 12:08:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6897. [2021-12-15 12:08:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.5061638868745468) internal successors, (10385), 6896 states have internal predecessors, (10385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10385 transitions. [2021-12-15 12:08:54,042 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10385 transitions. Word has length 79 [2021-12-15 12:08:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:54,042 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10385 transitions. [2021-12-15 12:08:54,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10385 transitions. [2021-12-15 12:08:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 12:08:54,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:54,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:54,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:08:54,044 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2021-12-15 12:08:54,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:54,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145393993] [2021-12-15 12:08:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:54,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:54,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:54,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145393993] [2021-12-15 12:08:54,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145393993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:54,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:54,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:08:54,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797790151] [2021-12-15 12:08:54,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:54,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:08:54,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:08:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:08:54,105 INFO L87 Difference]: Start difference. First operand 6897 states and 10385 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:54,382 INFO L93 Difference]: Finished difference Result 12243 states and 18258 transitions. [2021-12-15 12:08:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:08:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-15 12:08:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:54,400 INFO L225 Difference]: With dead ends: 12243 [2021-12-15 12:08:54,400 INFO L226 Difference]: Without dead ends: 6897 [2021-12-15 12:08:54,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:08:54,413 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 4648 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:54,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4648 Valid, 3055 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-12-15 12:08:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 6897. [2021-12-15 12:08:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.496881798404641) internal successors, (10321), 6896 states have internal predecessors, (10321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10321 transitions. [2021-12-15 12:08:54,741 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10321 transitions. Word has length 80 [2021-12-15 12:08:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:54,742 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10321 transitions. [2021-12-15 12:08:54,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10321 transitions. [2021-12-15 12:08:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 12:08:54,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:54,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:54,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:08:54,744 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2021-12-15 12:08:54,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:54,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172964304] [2021-12-15 12:08:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:54,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:54,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:54,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172964304] [2021-12-15 12:08:54,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172964304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:54,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:54,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:54,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690809241] [2021-12-15 12:08:54,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:54,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:54,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:54,821 INFO L87 Difference]: Start difference. First operand 6897 states and 10321 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:55,294 INFO L93 Difference]: Finished difference Result 10867 states and 16028 transitions. [2021-12-15 12:08:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 12:08:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-15 12:08:55,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:55,322 INFO L225 Difference]: With dead ends: 10867 [2021-12-15 12:08:55,323 INFO L226 Difference]: Without dead ends: 10865 [2021-12-15 12:08:55,330 INFO L932 BasicCegarLoop]: 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 [2021-12-15 12:08:55,331 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 696 mSDsluCounter, 9179 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 10807 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:55,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 10807 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10865 states. [2021-12-15 12:08:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10865 to 7089. [2021-12-15 12:08:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7087 states have (on average 1.4789050373924086) internal successors, (10481), 7088 states have internal predecessors, (10481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 10481 transitions. [2021-12-15 12:08:55,774 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 10481 transitions. Word has length 80 [2021-12-15 12:08:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:55,774 INFO L470 AbstractCegarLoop]: Abstraction has 7089 states and 10481 transitions. [2021-12-15 12:08:55,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 10481 transitions. [2021-12-15 12:08:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 12:08:55,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:55,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:55,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 12:08:55,777 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2021-12-15 12:08:55,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:55,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6484978] [2021-12-15 12:08:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:55,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:55,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6484978] [2021-12-15 12:08:55,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6484978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:55,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:55,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:55,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394623329] [2021-12-15 12:08:55,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:55,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:55,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:55,809 INFO L87 Difference]: Start difference. First operand 7089 states and 10481 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:56,203 INFO L93 Difference]: Finished difference Result 12728 states and 18679 transitions. [2021-12-15 12:08:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-15 12:08:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:56,223 INFO L225 Difference]: With dead ends: 12728 [2021-12-15 12:08:56,223 INFO L226 Difference]: Without dead ends: 9653 [2021-12-15 12:08:56,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:56,232 INFO L933 BasicCegarLoop]: 1658 mSDtfsCounter, 1523 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:56,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2021-12-15 12:08:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9651. [2021-12-15 12:08:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.4611876878432999) internal successors, (14099), 9650 states have internal predecessors, (14099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 14099 transitions. [2021-12-15 12:08:56,629 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 14099 transitions. Word has length 81 [2021-12-15 12:08:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:56,629 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 14099 transitions. [2021-12-15 12:08:56,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 14099 transitions. [2021-12-15 12:08:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 12:08:56,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:56,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:56,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:08:56,631 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash 684368052, now seen corresponding path program 1 times [2021-12-15 12:08:56,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:56,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256324375] [2021-12-15 12:08:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:56,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 12:08:56,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256324375] [2021-12-15 12:08:56,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256324375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:56,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:56,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:08:56,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629882871] [2021-12-15 12:08:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:56,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:56,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:56,667 INFO L87 Difference]: Start difference. First operand 9651 states and 14099 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:59,379 INFO L93 Difference]: Finished difference Result 12657 states and 19026 transitions. [2021-12-15 12:08:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-15 12:08:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:59,411 INFO L225 Difference]: With dead ends: 12657 [2021-12-15 12:08:59,411 INFO L226 Difference]: Without dead ends: 11153 [2021-12-15 12:08:59,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:59,418 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:59,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 618 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 12:08:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-12-15 12:08:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 11153. [2021-12-15 12:08:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11153 states, 11151 states have (on average 1.4275849699578513) internal successors, (15919), 11152 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11153 states to 11153 states and 15919 transitions. [2021-12-15 12:08:59,777 INFO L78 Accepts]: Start accepts. Automaton has 11153 states and 15919 transitions. Word has length 91 [2021-12-15 12:08:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:59,777 INFO L470 AbstractCegarLoop]: Abstraction has 11153 states and 15919 transitions. [2021-12-15 12:08:59,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 11153 states and 15919 transitions. [2021-12-15 12:08:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 12:08:59,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:59,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:59,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:08:59,779 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:59,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 626430014, now seen corresponding path program 1 times [2021-12-15 12:08:59,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:59,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569733308] [2021-12-15 12:08:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:59,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:59,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569733308] [2021-12-15 12:08:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569733308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:59,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:59,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:59,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332322900] [2021-12-15 12:08:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:59,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 12:08:59,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 12:08:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 12:08:59,831 INFO L87 Difference]: Start difference. First operand 11153 states and 15919 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:02,256 INFO L93 Difference]: Finished difference Result 14926 states and 21060 transitions. [2021-12-15 12:09:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:09:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-15 12:09:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:02,271 INFO L225 Difference]: With dead ends: 14926 [2021-12-15 12:09:02,271 INFO L226 Difference]: Without dead ends: 11920 [2021-12-15 12:09:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:09:02,276 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 1503 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:02,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1931 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 12:09:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11920 states. [2021-12-15 12:09:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11920 to 11904. [2021-12-15 12:09:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 11902 states have (on average 1.4011090573012939) internal successors, (16676), 11903 states have internal predecessors, (16676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 16676 transitions. [2021-12-15 12:09:02,591 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 16676 transitions. Word has length 95 [2021-12-15 12:09:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:02,591 INFO L470 AbstractCegarLoop]: Abstraction has 11904 states and 16676 transitions. [2021-12-15 12:09:02,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 16676 transitions. [2021-12-15 12:09:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:02,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:02,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:02,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 12:09:02,596 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1561529476, now seen corresponding path program 1 times [2021-12-15 12:09:02,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:02,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911060184] [2021-12-15 12:09:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:02,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 12:09:02,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:02,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911060184] [2021-12-15 12:09:02,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911060184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:02,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:02,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:02,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789990933] [2021-12-15 12:09:02,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:02,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:02,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:02,654 INFO L87 Difference]: Start difference. First operand 11904 states and 16676 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:04,368 INFO L93 Difference]: Finished difference Result 62094 states and 88395 transitions. [2021-12-15 12:09:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:04,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:09:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:04,451 INFO L225 Difference]: With dead ends: 62094 [2021-12-15 12:09:04,451 INFO L226 Difference]: Without dead ends: 53996 [2021-12-15 12:09:04,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:04,473 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8634 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8634 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:04,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8634 Valid, 3833 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53996 states. [2021-12-15 12:09:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53996 to 20000. [2021-12-15 12:09:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20000 states, 19998 states have (on average 1.4083408340834083) internal successors, (28164), 19999 states have internal predecessors, (28164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20000 states to 20000 states and 28164 transitions. [2021-12-15 12:09:05,388 INFO L78 Accepts]: Start accepts. Automaton has 20000 states and 28164 transitions. Word has length 112 [2021-12-15 12:09:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:05,389 INFO L470 AbstractCegarLoop]: Abstraction has 20000 states and 28164 transitions. [2021-12-15 12:09:05,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20000 states and 28164 transitions. [2021-12-15 12:09:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:05,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:05,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:05,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 12:09:05,395 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash 964655004, now seen corresponding path program 1 times [2021-12-15 12:09:05,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:05,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524053569] [2021-12-15 12:09:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:05,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 12:09:05,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:05,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524053569] [2021-12-15 12:09:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524053569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:05,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:05,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:05,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4842295] [2021-12-15 12:09:05,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:05,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:05,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:05,454 INFO L87 Difference]: Start difference. First operand 20000 states and 28164 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:07,809 INFO L93 Difference]: Finished difference Result 70190 states and 99883 transitions. [2021-12-15 12:09:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:09:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:07,903 INFO L225 Difference]: With dead ends: 70190 [2021-12-15 12:09:07,903 INFO L226 Difference]: Without dead ends: 62092 [2021-12-15 12:09:07,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:07,928 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8459 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8459 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:07,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8459 Valid, 3881 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62092 states. [2021-12-15 12:09:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62092 to 32160. [2021-12-15 12:09:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32160 states, 32158 states have (on average 1.4091672367684558) internal successors, (45316), 32159 states have internal predecessors, (45316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32160 states to 32160 states and 45316 transitions. [2021-12-15 12:09:09,539 INFO L78 Accepts]: Start accepts. Automaton has 32160 states and 45316 transitions. Word has length 112 [2021-12-15 12:09:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:09,540 INFO L470 AbstractCegarLoop]: Abstraction has 32160 states and 45316 transitions. [2021-12-15 12:09:09,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32160 states and 45316 transitions. [2021-12-15 12:09:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:09,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:09,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:09,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 12:09:09,547 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:09,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2096294844, now seen corresponding path program 1 times [2021-12-15 12:09:09,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639661993] [2021-12-15 12:09:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:09,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 12:09:09,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639661993] [2021-12-15 12:09:09,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639661993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:09,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:09,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:09,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442001441] [2021-12-15 12:09:09,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:09,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:09,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:09,607 INFO L87 Difference]: Start difference. First operand 32160 states and 45316 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:12,538 INFO L93 Difference]: Finished difference Result 78286 states and 111371 transitions. [2021-12-15 12:09:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:09:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:12,631 INFO L225 Difference]: With dead ends: 78286 [2021-12-15 12:09:12,631 INFO L226 Difference]: Without dead ends: 70188 [2021-12-15 12:09:12,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:12,653 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8425 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8425 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:12,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8425 Valid, 3925 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70188 states. [2021-12-15 12:09:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70188 to 40256. [2021-12-15 12:09:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40256 states, 40254 states have (on average 1.4111392656630397) internal successors, (56804), 40255 states have internal predecessors, (56804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40256 states to 40256 states and 56804 transitions. [2021-12-15 12:09:14,621 INFO L78 Accepts]: Start accepts. Automaton has 40256 states and 56804 transitions. Word has length 112 [2021-12-15 12:09:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:14,621 INFO L470 AbstractCegarLoop]: Abstraction has 40256 states and 56804 transitions. [2021-12-15 12:09:14,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 40256 states and 56804 transitions. [2021-12-15 12:09:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:14,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:14,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:14,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:09:14,628 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:14,628 INFO L85 PathProgramCache]: Analyzing trace with hash 860835804, now seen corresponding path program 1 times [2021-12-15 12:09:14,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:14,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110551661] [2021-12-15 12:09:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:14,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 12:09:14,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:14,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110551661] [2021-12-15 12:09:14,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110551661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:14,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:14,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:14,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585293957] [2021-12-15 12:09:14,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:14,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:14,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:14,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:14,705 INFO L87 Difference]: Start difference. First operand 40256 states and 56804 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:18,444 INFO L93 Difference]: Finished difference Result 86382 states and 122859 transitions. [2021-12-15 12:09:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:18,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:09:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:18,566 INFO L225 Difference]: With dead ends: 86382 [2021-12-15 12:09:18,566 INFO L226 Difference]: Without dead ends: 78284 [2021-12-15 12:09:18,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:18,592 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8497 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8497 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8497 Valid, 3944 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78284 states. [2021-12-15 12:09:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78284 to 48352. [2021-12-15 12:09:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48352 states, 48350 states have (on average 1.412450879007239) internal successors, (68292), 48351 states have internal predecessors, (68292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48352 states to 48352 states and 68292 transitions. [2021-12-15 12:09:21,514 INFO L78 Accepts]: Start accepts. Automaton has 48352 states and 68292 transitions. Word has length 112 [2021-12-15 12:09:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:21,514 INFO L470 AbstractCegarLoop]: Abstraction has 48352 states and 68292 transitions. [2021-12-15 12:09:21,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 48352 states and 68292 transitions. [2021-12-15 12:09:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:09:21,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:21,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:21,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:09:21,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash -560159748, now seen corresponding path program 1 times [2021-12-15 12:09:21,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696526487] [2021-12-15 12:09:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:21,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 12:09:21,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:21,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696526487] [2021-12-15 12:09:21,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696526487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:21,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:21,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:21,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999450774] [2021-12-15 12:09:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:21,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:21,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:21,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:21,580 INFO L87 Difference]: Start difference. First operand 48352 states and 68292 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:25,757 INFO L93 Difference]: Finished difference Result 94478 states and 134347 transitions. [2021-12-15 12:09:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:25,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:09:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:25,909 INFO L225 Difference]: With dead ends: 94478 [2021-12-15 12:09:25,909 INFO L226 Difference]: Without dead ends: 86380 [2021-12-15 12:09:25,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:09:25,943 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8611 mSDsluCounter, 2217 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8611 SdHoareTripleChecker+Valid, 3885 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:25,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8611 Valid, 3885 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:09:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86380 states. [2021-12-15 12:09:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86380 to 56448. [2021-12-15 12:09:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56448 states, 56446 states have (on average 1.4133862452609574) internal successors, (79780), 56447 states have internal predecessors, (79780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56448 states to 56448 states and 79780 transitions. [2021-12-15 12:09:29,364 INFO L78 Accepts]: Start accepts. Automaton has 56448 states and 79780 transitions. Word has length 112 [2021-12-15 12:09:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:29,365 INFO L470 AbstractCegarLoop]: Abstraction has 56448 states and 79780 transitions. [2021-12-15 12:09:29,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 56448 states and 79780 transitions. [2021-12-15 12:09:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 12:09:29,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:29,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:29,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 12:09:29,375 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1259528020, now seen corresponding path program 1 times [2021-12-15 12:09:29,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:29,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269653476] [2021-12-15 12:09:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:29,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:09:29,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:29,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269653476] [2021-12-15 12:09:29,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269653476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:29,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:29,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:09:29,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049450698] [2021-12-15 12:09:29,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:29,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:09:29,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:09:29,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:29,511 INFO L87 Difference]: Start difference. First operand 56448 states and 79780 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:31,839 INFO L93 Difference]: Finished difference Result 93094 states and 132238 transitions. [2021-12-15 12:09:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:09:31,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-15 12:09:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:09:31,900 INFO L225 Difference]: With dead ends: 93094 [2021-12-15 12:09:31,900 INFO L226 Difference]: Without dead ends: 40452 [2021-12-15 12:09:31,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:09:31,958 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 62 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:09:31,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 3196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:09:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-12-15 12:09:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 40450. [2021-12-15 12:09:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40450 states, 40448 states have (on average 1.4124554984177216) internal successors, (57131), 40449 states have internal predecessors, (57131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40450 states to 40450 states and 57131 transitions. [2021-12-15 12:09:34,237 INFO L78 Accepts]: Start accepts. Automaton has 40450 states and 57131 transitions. Word has length 114 [2021-12-15 12:09:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:09:34,237 INFO L470 AbstractCegarLoop]: Abstraction has 40450 states and 57131 transitions. [2021-12-15 12:09:34,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 40450 states and 57131 transitions. [2021-12-15 12:09:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 12:09:34,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:09:34,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:09:34,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 12:09:34,243 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:09:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:09:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1037894815, now seen corresponding path program 1 times [2021-12-15 12:09:34,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:09:34,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404789990] [2021-12-15 12:09:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:09:34,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:09:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:09:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:09:34,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:09:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404789990] [2021-12-15 12:09:34,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404789990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:09:34,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:09:34,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:09:34,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153764381] [2021-12-15 12:09:34,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:09:34,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:09:34,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:09:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:09:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:09:34,304 INFO L87 Difference]: Start difference. First operand 40450 states and 57131 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:09:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:09:38,331 INFO L93 Difference]: Finished difference Result 74256 states and 105522 transitions. [2021-12-15 12:09:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:09:38,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 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 114 [2021-12-15 12:09:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted.