./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label41.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/eca-rers2012/Problem16_label41.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 50ebe5851919469bd2115fd9df4bc67f7eb85dba2d380b6a5ab23ed124700184 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:55:42,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:55:42,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:55:42,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:55:42,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:55:42,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:55:42,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:55:42,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:55:42,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:55:42,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:55:42,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:55:42,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:55:42,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:55:42,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:55:42,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:55:42,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:55:42,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:55:42,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:55:42,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:55:42,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:55:42,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:55:42,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:55:42,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:55:42,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:55:42,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:55:42,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:55:42,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:55:42,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:55:42,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:55:42,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:55:42,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:55:42,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:55:42,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:55:42,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:55:42,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:55:42,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:55:42,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:55:42,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:55:42,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:55:42,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:55:42,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:55:42,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:55:42,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:55:42,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:55:42,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:55:42,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:55:42,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:55:42,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:55:42,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:55:42,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:55:42,145 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:55:42,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:55:42,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:55:42,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:55:42,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:55:42,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:55:42,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:55:42,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:55:42,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:55:42,147 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:55:42,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:55:42,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:55:42,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:55:42,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:55:42,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:55:42,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:55:42,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:55:42,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:55:42,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:55:42,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:55:42,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:55:42,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:55:42,150 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:55:42,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:55:42,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:55:42,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:55:42,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50ebe5851919469bd2115fd9df4bc67f7eb85dba2d380b6a5ab23ed124700184 [2021-12-15 09:55:42,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:55:42,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:55:42,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:55:42,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:55:42,396 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:55:42,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label41.c [2021-12-15 09:55:42,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80b8e17b4/2de6b90fdba843929ceea7faded925bc/FLAG4e84523fd [2021-12-15 09:55:42,961 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:55:42,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label41.c [2021-12-15 09:55:42,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80b8e17b4/2de6b90fdba843929ceea7faded925bc/FLAG4e84523fd [2021-12-15 09:55:43,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80b8e17b4/2de6b90fdba843929ceea7faded925bc [2021-12-15 09:55:43,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:55:43,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:55:43,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:55:43,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:55:43,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:55:43,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:55:43" (1/1) ... [2021-12-15 09:55:43,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ed160d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:43, skipping insertion in model container [2021-12-15 09:55:43,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:55:43" (1/1) ... [2021-12-15 09:55:43,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:55:43,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:55:43,856 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/eca-rers2012/Problem16_label41.c[2609,2622] [2021-12-15 09:55:44,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:55:44,226 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:55:44,248 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/eca-rers2012/Problem16_label41.c[2609,2622] [2021-12-15 09:55:44,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:55:44,408 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:55:44,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44 WrapperNode [2021-12-15 09:55:44,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:55:44,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:55:44,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:55:44,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:55:44,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,503 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-15 09:55:44,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:55:44,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:55:44,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:55:44,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:55:44,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:55:44,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:55:44,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:55:44,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:55:44,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (1/1) ... [2021-12-15 09:55:44,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:55:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:44,672 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 09:55:44,691 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 09:55:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:55:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:55:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:55:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:55:44,747 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:55:44,748 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:55:45,953 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:55:45,967 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:55:45,967 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:55:45,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:55:45 BoogieIcfgContainer [2021-12-15 09:55:45,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:55:45,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:55:45,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:55:45,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:55:45,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:55:43" (1/3) ... [2021-12-15 09:55:45,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fe1ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:55:45, skipping insertion in model container [2021-12-15 09:55:45,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:44" (2/3) ... [2021-12-15 09:55:45,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fe1ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:55:45, skipping insertion in model container [2021-12-15 09:55:45,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:55:45" (3/3) ... [2021-12-15 09:55:45,976 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label41.c [2021-12-15 09:55:45,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:55:45,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:55:46,010 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:55:46,015 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 09:55:46,015 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:55:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 09:55:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 09:55:46,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:46,034 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] [2021-12-15 09:55:46,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:46,038 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2021-12-15 09:55:46,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:46,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746956215] [2021-12-15 09:55:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:46,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:46,206 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 09:55:46,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746956215] [2021-12-15 09:55:46,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746956215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:46,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:46,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:46,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480027651] [2021-12-15 09:55:46,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:46,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:46,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:46,239 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 09:55:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:47,519 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-15 09:55:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-15 09:55:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:47,537 INFO L225 Difference]: With dead ends: 1122 [2021-12-15 09:55:47,538 INFO L226 Difference]: Without dead ends: 662 [2021-12-15 09:55:47,541 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 09:55:47,547 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 337 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:47,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 223 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:55:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-15 09:55:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-15 09:55:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5824508320726172) internal successors, (1046), 661 states have internal predecessors, (1046), 0 states have call successors, (0), 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 09:55:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1046 transitions. [2021-12-15 09:55:47,628 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1046 transitions. Word has length 23 [2021-12-15 09:55:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:47,629 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1046 transitions. [2021-12-15 09:55:47,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 09:55:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1046 transitions. [2021-12-15 09:55:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-15 09:55:47,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:47,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:55:47,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:55:47,644 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:47,645 INFO L85 PathProgramCache]: Analyzing trace with hash -222045669, now seen corresponding path program 1 times [2021-12-15 09:55:47,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:47,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586972954] [2021-12-15 09:55:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:47,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:47,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:47,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586972954] [2021-12-15 09:55:47,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586972954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:47,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:47,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:47,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185916427] [2021-12-15 09:55:47,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:47,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:47,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:47,810 INFO L87 Difference]: Start difference. First operand 662 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 09:55:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:48,954 INFO L93 Difference]: Finished difference Result 1980 states and 3133 transitions. [2021-12-15 09:55:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-12-15 09:55:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:48,960 INFO L225 Difference]: With dead ends: 1980 [2021-12-15 09:55:48,960 INFO L226 Difference]: Without dead ends: 1320 [2021-12-15 09:55:48,962 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 09:55:48,963 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 300 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:48,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 197 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:55:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-15 09:55:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-15 09:55:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.3745261561789235) internal successors, (1813), 1319 states have internal predecessors, (1813), 0 states have call successors, (0), 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 09:55:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1813 transitions. [2021-12-15 09:55:48,995 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1813 transitions. Word has length 94 [2021-12-15 09:55:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:48,995 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1813 transitions. [2021-12-15 09:55:48,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 09:55:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1813 transitions. [2021-12-15 09:55:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 09:55:49,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:49,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:55:49,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:55:49,014 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash -853384893, now seen corresponding path program 1 times [2021-12-15 09:55:49,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:49,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863439202] [2021-12-15 09:55:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:49,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:49,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863439202] [2021-12-15 09:55:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863439202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:49,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:49,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:49,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996052032] [2021-12-15 09:55:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:49,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:49,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:49,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:49,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:49,111 INFO L87 Difference]: Start difference. First operand 1320 states and 1813 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 09:55:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:50,184 INFO L93 Difference]: Finished difference Result 3296 states and 4626 transitions. [2021-12-15 09:55:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:50,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-15 09:55:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:50,191 INFO L225 Difference]: With dead ends: 3296 [2021-12-15 09:55:50,191 INFO L226 Difference]: Without dead ends: 1978 [2021-12-15 09:55:50,192 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 09:55:50,193 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 361 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:50,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 539 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-15 09:55:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-15 09:55:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2923621648963075) internal successors, (2555), 1977 states have internal predecessors, (2555), 0 states have call successors, (0), 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 09:55:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2555 transitions. [2021-12-15 09:55:50,220 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2555 transitions. Word has length 110 [2021-12-15 09:55:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:50,220 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2555 transitions. [2021-12-15 09:55:50,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 09:55:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2555 transitions. [2021-12-15 09:55:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-15 09:55:50,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:50,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:55:50,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:55:50,225 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1923582625, now seen corresponding path program 1 times [2021-12-15 09:55:50,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998715402] [2021-12-15 09:55:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:50,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-15 09:55:50,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:50,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998715402] [2021-12-15 09:55:50,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998715402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:50,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:50,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:50,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631141045] [2021-12-15 09:55:50,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:50,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:50,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:50,320 INFO L87 Difference]: Start difference. First operand 1978 states and 2555 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 09:55:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:51,388 INFO L93 Difference]: Finished difference Result 5270 states and 6852 transitions. [2021-12-15 09:55:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 295 [2021-12-15 09:55:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:51,395 INFO L225 Difference]: With dead ends: 5270 [2021-12-15 09:55:51,396 INFO L226 Difference]: Without dead ends: 2636 [2021-12-15 09:55:51,398 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 09:55:51,399 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 358 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:51,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 156 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-12-15 09:55:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2021-12-15 09:55:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 1.093358633776091) internal successors, (2881), 2635 states have internal predecessors, (2881), 0 states have call successors, (0), 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 09:55:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 2881 transitions. [2021-12-15 09:55:51,430 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 2881 transitions. Word has length 295 [2021-12-15 09:55:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:51,430 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 2881 transitions. [2021-12-15 09:55:51,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 09:55:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 2881 transitions. [2021-12-15 09:55:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-15 09:55:51,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:51,434 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:51,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:55:51,434 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash -820256712, now seen corresponding path program 1 times [2021-12-15 09:55:51,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:51,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159250083] [2021-12-15 09:55:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:51,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-15 09:55:51,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159250083] [2021-12-15 09:55:51,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159250083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:51,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:51,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:51,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643607898] [2021-12-15 09:55:51,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:51,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:51,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:51,525 INFO L87 Difference]: Start difference. First operand 2636 states and 2881 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 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 09:55:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:52,323 INFO L93 Difference]: Finished difference Result 7573 states and 8298 transitions. [2021-12-15 09:55:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 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 336 [2021-12-15 09:55:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:52,343 INFO L225 Difference]: With dead ends: 7573 [2021-12-15 09:55:52,343 INFO L226 Difference]: Without dead ends: 4939 [2021-12-15 09:55:52,346 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 09:55:52,349 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 238 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:52,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 58 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:55:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2021-12-15 09:55:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4610. [2021-12-15 09:55:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.0867867216315903) internal successors, (5009), 4609 states have internal predecessors, (5009), 0 states have call successors, (0), 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 09:55:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5009 transitions. [2021-12-15 09:55:52,415 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5009 transitions. Word has length 336 [2021-12-15 09:55:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:52,415 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5009 transitions. [2021-12-15 09:55:52,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 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 09:55:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5009 transitions. [2021-12-15 09:55:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-12-15 09:55:52,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:52,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:55:52,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:55:52,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:52,427 INFO L85 PathProgramCache]: Analyzing trace with hash -345618747, now seen corresponding path program 1 times [2021-12-15 09:55:52,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:52,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177750937] [2021-12-15 09:55:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:52,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-15 09:55:52,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177750937] [2021-12-15 09:55:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177750937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:52,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:52,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933173135] [2021-12-15 09:55:52,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:52,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:55:52,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:55:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:55:52,583 INFO L87 Difference]: Start difference. First operand 4610 states and 5009 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 09:55:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:53,618 INFO L93 Difference]: Finished difference Result 9591 states and 10396 transitions. [2021-12-15 09:55:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:55:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 450 [2021-12-15 09:55:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:53,634 INFO L225 Difference]: With dead ends: 9591 [2021-12-15 09:55:53,635 INFO L226 Difference]: Without dead ends: 4983 [2021-12-15 09:55:53,640 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 09:55:53,641 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 409 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:53,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 175 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-12-15 09:55:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 4939. [2021-12-15 09:55:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.0814094775212637) internal successors, (5340), 4938 states have internal predecessors, (5340), 0 states have call successors, (0), 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 09:55:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5340 transitions. [2021-12-15 09:55:53,716 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5340 transitions. Word has length 450 [2021-12-15 09:55:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:53,717 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 5340 transitions. [2021-12-15 09:55:53,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 09:55:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5340 transitions. [2021-12-15 09:55:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-12-15 09:55:53,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:53,729 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:55:53,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:55:53,729 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:53,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1322328393, now seen corresponding path program 1 times [2021-12-15 09:55:53,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:53,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318630960] [2021-12-15 09:55:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:53,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 418 proven. 101 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 09:55:53,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318630960] [2021-12-15 09:55:53,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318630960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:53,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143468914] [2021-12-15 09:55:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:53,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:53,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:53,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:55:54,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:55:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:54,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-15 09:55:55,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:55,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143468914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:55,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:55,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 09:55:55,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006606407] [2021-12-15 09:55:55,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:55,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:55,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:55,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:55,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:55,243 INFO L87 Difference]: Start difference. First operand 4939 states and 5340 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 2 states have internal predecessors, (347), 0 states have call successors, (0), 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 09:55:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:55,977 INFO L93 Difference]: Finished difference Result 10534 states and 11403 transitions. [2021-12-15 09:55:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 2 states have internal predecessors, (347), 0 states have call successors, (0), 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 554 [2021-12-15 09:55:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:55,996 INFO L225 Difference]: With dead ends: 10534 [2021-12-15 09:55:55,996 INFO L226 Difference]: Without dead ends: 5926 [2021-12-15 09:55:56,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:56,003 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:56,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 31 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-12-15 09:55:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2021-12-15 09:55:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.061434599156118) internal successors, (6289), 5925 states have internal predecessors, (6289), 0 states have call successors, (0), 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 09:55:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6289 transitions. [2021-12-15 09:55:56,083 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6289 transitions. Word has length 554 [2021-12-15 09:55:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:56,084 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6289 transitions. [2021-12-15 09:55:56,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 2 states have internal predecessors, (347), 0 states have call successors, (0), 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 09:55:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6289 transitions. [2021-12-15 09:55:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-12-15 09:55:56,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:56,101 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:55:56,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:56,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:56,316 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2038861390, now seen corresponding path program 1 times [2021-12-15 09:55:56,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:56,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989220889] [2021-12-15 09:55:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:56,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 836 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 09:55:56,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:56,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989220889] [2021-12-15 09:55:56,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989220889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:56,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:56,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:56,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557202666] [2021-12-15 09:55:56,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:56,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:56,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:56,528 INFO L87 Difference]: Start difference. First operand 5926 states and 6289 transitions. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 09:55:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:57,294 INFO L93 Difference]: Finished difference Result 14482 states and 15474 transitions. [2021-12-15 09:55:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 679 [2021-12-15 09:55:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:57,318 INFO L225 Difference]: With dead ends: 14482 [2021-12-15 09:55:57,318 INFO L226 Difference]: Without dead ends: 8887 [2021-12-15 09:55:57,325 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 09:55:57,326 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:57,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 426 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-12-15 09:55:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8558. [2021-12-15 09:55:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 1.048381442094192) internal successors, (8971), 8557 states have internal predecessors, (8971), 0 states have call successors, (0), 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 09:55:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 8971 transitions. [2021-12-15 09:55:57,440 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 8971 transitions. Word has length 679 [2021-12-15 09:55:57,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:57,442 INFO L470 AbstractCegarLoop]: Abstraction has 8558 states and 8971 transitions. [2021-12-15 09:55:57,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 09:55:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 8971 transitions. [2021-12-15 09:55:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2021-12-15 09:55:57,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:57,471 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:57,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:55:57,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:57,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1134557097, now seen corresponding path program 1 times [2021-12-15 09:55:57,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:57,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161190117] [2021-12-15 09:55:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:57,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 803 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-15 09:55:57,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:57,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161190117] [2021-12-15 09:55:57,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161190117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:57,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:57,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:57,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863672718] [2021-12-15 09:55:57,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:57,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:57,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:57,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:57,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:57,665 INFO L87 Difference]: Start difference. First operand 8558 states and 8971 transitions. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 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 09:55:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:58,468 INFO L93 Difference]: Finished difference Result 19417 states and 20484 transitions. [2021-12-15 09:55:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 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 781 [2021-12-15 09:55:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:58,487 INFO L225 Difference]: With dead ends: 19417 [2021-12-15 09:55:58,488 INFO L226 Difference]: Without dead ends: 11190 [2021-12-15 09:55:58,494 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 09:55:58,495 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 175 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:58,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 414 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-15 09:55:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 10532. [2021-12-15 09:55:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 1.0454847592821195) internal successors, (11010), 10531 states have internal predecessors, (11010), 0 states have call successors, (0), 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 09:55:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 11010 transitions. [2021-12-15 09:55:58,623 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 11010 transitions. Word has length 781 [2021-12-15 09:55:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:58,624 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 11010 transitions. [2021-12-15 09:55:58,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 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 09:55:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 11010 transitions. [2021-12-15 09:55:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2021-12-15 09:55:58,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:58,639 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:58,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:55:58,639 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1374532913, now seen corresponding path program 1 times [2021-12-15 09:55:58,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:58,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455570371] [2021-12-15 09:55:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:58,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 1414 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-12-15 09:55:58,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:58,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455570371] [2021-12-15 09:55:58,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455570371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:58,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:58,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:58,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131464889] [2021-12-15 09:55:58,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:58,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:58,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:58,976 INFO L87 Difference]: Start difference. First operand 10532 states and 11010 transitions. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 09:55:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:59,934 INFO L93 Difference]: Finished difference Result 23694 states and 24916 transitions. [2021-12-15 09:55:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:59,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 1039 [2021-12-15 09:55:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:59,959 INFO L225 Difference]: With dead ends: 23694 [2021-12-15 09:55:59,960 INFO L226 Difference]: Without dead ends: 13493 [2021-12-15 09:55:59,971 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 09:55:59,971 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:59,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 433 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:55:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-12-15 09:56:00,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 12835. [2021-12-15 09:56:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0409069658719028) internal successors, (13359), 12834 states have internal predecessors, (13359), 0 states have call successors, (0), 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 09:56:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13359 transitions. [2021-12-15 09:56:00,096 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13359 transitions. Word has length 1039 [2021-12-15 09:56:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:00,097 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13359 transitions. [2021-12-15 09:56:00,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 09:56:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13359 transitions. [2021-12-15 09:56:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2021-12-15 09:56:00,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:00,111 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:00,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:56:00,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:00,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1986780064, now seen corresponding path program 1 times [2021-12-15 09:56:00,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:00,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558070348] [2021-12-15 09:56:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:00,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 763 proven. 784 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-15 09:56:00,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:00,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558070348] [2021-12-15 09:56:00,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558070348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832715689] [2021-12-15 09:56:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:00,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:00,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:00,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:56:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:56:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 1130 proven. 0 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2021-12-15 09:56:02,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:02,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832715689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:02,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:02,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:56:02,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233980839] [2021-12-15 09:56:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:02,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:02,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:02,124 INFO L87 Difference]: Start difference. First operand 12835 states and 13359 transitions. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 09:56:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:02,826 INFO L93 Difference]: Finished difference Result 25339 states and 26385 transitions. [2021-12-15 09:56:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:02,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 1040 [2021-12-15 09:56:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:02,842 INFO L225 Difference]: With dead ends: 25339 [2021-12-15 09:56:02,842 INFO L226 Difference]: Without dead ends: 12835 [2021-12-15 09:56:02,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:02,852 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 117 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:02,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 377 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2021-12-15 09:56:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12835. [2021-12-15 09:56:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0363877201184355) internal successors, (13301), 12834 states have internal predecessors, (13301), 0 states have call successors, (0), 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 09:56:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13301 transitions. [2021-12-15 09:56:02,972 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13301 transitions. Word has length 1040 [2021-12-15 09:56:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:02,973 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13301 transitions. [2021-12-15 09:56:02,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 09:56:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13301 transitions. [2021-12-15 09:56:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1212 [2021-12-15 09:56:02,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:02,988 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:03,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:03,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 09:56:03,206 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash -286072666, now seen corresponding path program 1 times [2021-12-15 09:56:03,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:03,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520474408] [2021-12-15 09:56:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:03,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2754 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2021-12-15 09:56:03,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:03,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520474408] [2021-12-15 09:56:03,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520474408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:03,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:03,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:03,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146652629] [2021-12-15 09:56:03,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:03,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:03,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:03,659 INFO L87 Difference]: Start difference. First operand 12835 states and 13301 transitions. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 09:56:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:04,434 INFO L93 Difference]: Finished difference Result 27642 states and 28662 transitions. [2021-12-15 09:56:04,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 1211 [2021-12-15 09:56:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:04,452 INFO L225 Difference]: With dead ends: 27642 [2021-12-15 09:56:04,453 INFO L226 Difference]: Without dead ends: 13493 [2021-12-15 09:56:04,467 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 09:56:04,468 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 170 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:04,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 412 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-12-15 09:56:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 11519. [2021-12-15 09:56:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0298662962319847) internal successors, (11862), 11518 states have internal predecessors, (11862), 0 states have call successors, (0), 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 09:56:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11862 transitions. [2021-12-15 09:56:04,615 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11862 transitions. Word has length 1211 [2021-12-15 09:56:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:04,616 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 11862 transitions. [2021-12-15 09:56:04,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 09:56:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11862 transitions. [2021-12-15 09:56:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1538 [2021-12-15 09:56:04,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:04,635 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:04,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:56:04,635 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash -10171569, now seen corresponding path program 1 times [2021-12-15 09:56:04,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615197959] [2021-12-15 09:56:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:04,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4195 backedges. 2950 proven. 0 refuted. 0 times theorem prover too weak. 1245 trivial. 0 not checked. [2021-12-15 09:56:05,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615197959] [2021-12-15 09:56:05,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615197959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:05,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:05,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:56:05,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465247195] [2021-12-15 09:56:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:05,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:56:05,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:56:05,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:56:05,139 INFO L87 Difference]: Start difference. First operand 11519 states and 11862 transitions. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 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 09:56:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:05,996 INFO L93 Difference]: Finished difference Result 22732 states and 23416 transitions. [2021-12-15 09:56:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:56:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 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 1537 [2021-12-15 09:56:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:06,008 INFO L225 Difference]: With dead ends: 22732 [2021-12-15 09:56:06,009 INFO L226 Difference]: Without dead ends: 11544 [2021-12-15 09:56:06,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:56:06,016 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 264 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:06,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 441 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:56:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2021-12-15 09:56:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 11519. [2021-12-15 09:56:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.029692654974822) internal successors, (11860), 11518 states have internal predecessors, (11860), 0 states have call successors, (0), 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 09:56:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11860 transitions. [2021-12-15 09:56:06,125 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11860 transitions. Word has length 1537 [2021-12-15 09:56:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:06,126 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 11860 transitions. [2021-12-15 09:56:06,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 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 09:56:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11860 transitions. [2021-12-15 09:56:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2021-12-15 09:56:06,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:06,152 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:06,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:56:06,152 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:06,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1328441530, now seen corresponding path program 1 times [2021-12-15 09:56:06,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:06,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769903773] [2021-12-15 09:56:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:06,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 3466 proven. 0 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2021-12-15 09:56:06,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:06,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769903773] [2021-12-15 09:56:06,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769903773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:06,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:06,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:06,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427966565] [2021-12-15 09:56:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:06,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:06,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:06,529 INFO L87 Difference]: Start difference. First operand 11519 states and 11860 transitions. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 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 09:56:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:07,251 INFO L93 Difference]: Finished difference Result 22707 states and 23387 transitions. [2021-12-15 09:56:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:07,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 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 1669 [2021-12-15 09:56:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:07,261 INFO L225 Difference]: With dead ends: 22707 [2021-12-15 09:56:07,262 INFO L226 Difference]: Without dead ends: 11519 [2021-12-15 09:56:07,268 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 09:56:07,268 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 192 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:07,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 417 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-15 09:56:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 11190. [2021-12-15 09:56:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0210027705782465) internal successors, (11424), 11189 states have internal predecessors, (11424), 0 states have call successors, (0), 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 09:56:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11424 transitions. [2021-12-15 09:56:07,400 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11424 transitions. Word has length 1669 [2021-12-15 09:56:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:07,400 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11424 transitions. [2021-12-15 09:56:07,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 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 09:56:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11424 transitions. [2021-12-15 09:56:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1695 [2021-12-15 09:56:07,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:07,422 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:07,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:56:07,422 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash -928392436, now seen corresponding path program 1 times [2021-12-15 09:56:07,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:07,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626751652] [2021-12-15 09:56:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:07,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5998 backedges. 3820 proven. 0 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2021-12-15 09:56:07,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626751652] [2021-12-15 09:56:07,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626751652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:07,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:07,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:07,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968610235] [2021-12-15 09:56:07,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:07,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:07,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:07,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:07,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:07,900 INFO L87 Difference]: Start difference. First operand 11190 states and 11424 transitions. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 09:56:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:08,629 INFO L93 Difference]: Finished difference Result 22707 states and 23184 transitions. [2021-12-15 09:56:08,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:08,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 1694 [2021-12-15 09:56:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:08,639 INFO L225 Difference]: With dead ends: 22707 [2021-12-15 09:56:08,639 INFO L226 Difference]: Without dead ends: 11848 [2021-12-15 09:56:08,646 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 09:56:08,647 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:08,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 430 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-12-15 09:56:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11848. [2021-12-15 09:56:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0202582932387947) internal successors, (12087), 11847 states have internal predecessors, (12087), 0 states have call successors, (0), 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 09:56:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12087 transitions. [2021-12-15 09:56:08,830 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12087 transitions. Word has length 1694 [2021-12-15 09:56:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:08,831 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12087 transitions. [2021-12-15 09:56:08,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 09:56:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12087 transitions. [2021-12-15 09:56:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1749 [2021-12-15 09:56:08,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:08,859 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:08,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:56:08,859 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1808845613, now seen corresponding path program 1 times [2021-12-15 09:56:08,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:08,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671373150] [2021-12-15 09:56:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:08,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6020 backedges. 3154 proven. 66 refuted. 0 times theorem prover too weak. 2800 trivial. 0 not checked. [2021-12-15 09:56:09,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671373150] [2021-12-15 09:56:09,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671373150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:09,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562571567] [2021-12-15 09:56:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:09,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:09,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:09,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:56:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:09,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6020 backedges. 2495 proven. 0 refuted. 0 times theorem prover too weak. 3525 trivial. 0 not checked. [2021-12-15 09:56:13,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:13,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562571567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:13,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:13,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 09:56:13,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526131217] [2021-12-15 09:56:13,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:13,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:13,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:13,086 INFO L87 Difference]: Start difference. First operand 11848 states and 12087 transitions. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 2 states have internal predecessors, (505), 0 states have call successors, (0), 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 09:56:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:13,788 INFO L93 Difference]: Finished difference Result 23365 states and 23841 transitions. [2021-12-15 09:56:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 2 states have internal predecessors, (505), 0 states have call successors, (0), 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 1748 [2021-12-15 09:56:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:13,801 INFO L225 Difference]: With dead ends: 23365 [2021-12-15 09:56:13,801 INFO L226 Difference]: Without dead ends: 11848 [2021-12-15 09:56:13,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1751 GetRequests, 1747 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:13,811 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:13,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 78 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-12-15 09:56:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11848. [2021-12-15 09:56:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0200894741284714) internal successors, (12085), 11847 states have internal predecessors, (12085), 0 states have call successors, (0), 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 09:56:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12085 transitions. [2021-12-15 09:56:13,914 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12085 transitions. Word has length 1748 [2021-12-15 09:56:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:13,914 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12085 transitions. [2021-12-15 09:56:13,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 2 states have internal predecessors, (505), 0 states have call successors, (0), 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 09:56:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12085 transitions. [2021-12-15 09:56:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1779 [2021-12-15 09:56:13,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:13,939 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:56:13,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:14,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:14,153 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1510512431, now seen corresponding path program 1 times [2021-12-15 09:56:14,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:14,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734490145] [2021-12-15 09:56:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:14,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6830 backedges. 2499 proven. 156 refuted. 0 times theorem prover too weak. 4175 trivial. 0 not checked. [2021-12-15 09:56:14,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734490145] [2021-12-15 09:56:14,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734490145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752130187] [2021-12-15 09:56:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:14,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:14,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:14,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:56:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:56:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6830 backedges. 2655 proven. 0 refuted. 0 times theorem prover too weak. 4175 trivial. 0 not checked. [2021-12-15 09:56:16,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:16,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752130187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:16,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:16,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:56:16,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362107205] [2021-12-15 09:56:16,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:16,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:16,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:16,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:16,738 INFO L87 Difference]: Start difference. First operand 11848 states and 12085 transitions. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 09:56:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:17,328 INFO L93 Difference]: Finished difference Result 25668 states and 26213 transitions. [2021-12-15 09:56:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 1778 [2021-12-15 09:56:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:17,374 INFO L225 Difference]: With dead ends: 25668 [2021-12-15 09:56:17,374 INFO L226 Difference]: Without dead ends: 14151 [2021-12-15 09:56:17,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1782 GetRequests, 1777 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:17,383 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:17,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 92 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:56:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-15 09:56:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13164. [2021-12-15 09:56:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0191445719061005) internal successors, (13415), 13163 states have internal predecessors, (13415), 0 states have call successors, (0), 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 09:56:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13415 transitions. [2021-12-15 09:56:17,490 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13415 transitions. Word has length 1778 [2021-12-15 09:56:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:17,491 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13415 transitions. [2021-12-15 09:56:17,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 09:56:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13415 transitions. [2021-12-15 09:56:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1887 [2021-12-15 09:56:17,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:17,518 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:56:17,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:17,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:56:17,725 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:17,726 INFO L85 PathProgramCache]: Analyzing trace with hash -781038155, now seen corresponding path program 1 times [2021-12-15 09:56:17,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:17,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134028496] [2021-12-15 09:56:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:17,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6850 backedges. 3629 proven. 1560 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2021-12-15 09:56:18,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134028496] [2021-12-15 09:56:18,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134028496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329101868] [2021-12-15 09:56:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:18,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:18,780 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:18,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:56:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:56:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6850 backedges. 3626 proven. 0 refuted. 0 times theorem prover too weak. 3224 trivial. 0 not checked. [2021-12-15 09:56:21,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:21,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329101868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:21,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:21,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:56:21,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657943296] [2021-12-15 09:56:21,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:21,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:21,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:21,491 INFO L87 Difference]: Start difference. First operand 13164 states and 13415 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 09:56:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:22,255 INFO L93 Difference]: Finished difference Result 26655 states and 27166 transitions. [2021-12-15 09:56:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:22,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 1886 [2021-12-15 09:56:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:22,269 INFO L225 Difference]: With dead ends: 26655 [2021-12-15 09:56:22,270 INFO L226 Difference]: Without dead ends: 13822 [2021-12-15 09:56:22,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1888 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:22,279 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:22,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 426 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-15 09:56:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13822. [2021-12-15 09:56:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0185225381665581) internal successors, (14077), 13821 states have internal predecessors, (14077), 0 states have call successors, (0), 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 09:56:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14077 transitions. [2021-12-15 09:56:22,392 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14077 transitions. Word has length 1886 [2021-12-15 09:56:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:22,394 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14077 transitions. [2021-12-15 09:56:22,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 09:56:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14077 transitions. [2021-12-15 09:56:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1971 [2021-12-15 09:56:22,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:22,417 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:56:22,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:22,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:56:22,648 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:22,648 INFO L85 PathProgramCache]: Analyzing trace with hash -337973523, now seen corresponding path program 1 times [2021-12-15 09:56:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:22,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700964826] [2021-12-15 09:56:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:22,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7955 backedges. 3538 proven. 956 refuted. 0 times theorem prover too weak. 3461 trivial. 0 not checked. [2021-12-15 09:56:23,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:23,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700964826] [2021-12-15 09:56:23,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700964826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:23,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949959976] [2021-12-15 09:56:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:23,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:23,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:23,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:23,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:56:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:23,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2316 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7955 backedges. 4643 proven. 0 refuted. 0 times theorem prover too weak. 3312 trivial. 0 not checked. [2021-12-15 09:56:26,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949959976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:26,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:26,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 09:56:26,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9008354] [2021-12-15 09:56:26,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:26,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:56:26,264 INFO L87 Difference]: Start difference. First operand 13822 states and 14077 transitions. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 09:56:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:27,167 INFO L93 Difference]: Finished difference Result 30274 states and 30848 transitions. [2021-12-15 09:56:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 1970 [2021-12-15 09:56:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:27,183 INFO L225 Difference]: With dead ends: 30274 [2021-12-15 09:56:27,183 INFO L226 Difference]: Without dead ends: 16783 [2021-12-15 09:56:27,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1978 GetRequests, 1972 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:56:27,192 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:27,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 423 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:56:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-12-15 09:56:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 16125. [2021-12-15 09:56:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.017303398660382) internal successors, (16403), 16124 states have internal predecessors, (16403), 0 states have call successors, (0), 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 09:56:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16403 transitions. [2021-12-15 09:56:27,400 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16403 transitions. Word has length 1970 [2021-12-15 09:56:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:27,400 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16403 transitions. [2021-12-15 09:56:27,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 09:56:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16403 transitions. [2021-12-15 09:56:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2002 [2021-12-15 09:56:27,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:27,462 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:56:27,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:27,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:27,682 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1802320902, now seen corresponding path program 1 times [2021-12-15 09:56:27,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479838397] [2021-12-15 09:56:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:27,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 3663 proven. 969 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2021-12-15 09:56:28,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479838397] [2021-12-15 09:56:28,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479838397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531783645] [2021-12-15 09:56:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:28,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:28,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:28,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:28,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:56:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2350 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:56:28,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 3688 proven. 249 refuted. 0 times theorem prover too weak. 4394 trivial. 0 not checked. [2021-12-15 09:56:31,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:56:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 3937 proven. 0 refuted. 0 times theorem prover too weak. 4394 trivial. 0 not checked. [2021-12-15 09:56:34,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531783645] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:34,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:56:34,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 10 [2021-12-15 09:56:34,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040275035] [2021-12-15 09:56:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:34,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:34,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:34,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:56:34,503 INFO L87 Difference]: Start difference. First operand 16125 states and 16403 transitions. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 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 09:56:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:35,409 INFO L93 Difference]: Finished difference Result 32906 states and 33468 transitions. [2021-12-15 09:56:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 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 2001 [2021-12-15 09:56:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:35,423 INFO L225 Difference]: With dead ends: 32906 [2021-12-15 09:56:35,423 INFO L226 Difference]: Without dead ends: 17112 [2021-12-15 09:56:35,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4009 GetRequests, 4001 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:56:35,432 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:35,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 24 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:56:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17112 states. [2021-12-15 09:56:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17112 to 17112. [2021-12-15 09:56:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17112 states, 17111 states have (on average 1.0160130909940974) internal successors, (17385), 17111 states have internal predecessors, (17385), 0 states have call successors, (0), 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 09:56:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17112 states to 17112 states and 17385 transitions. [2021-12-15 09:56:35,581 INFO L78 Accepts]: Start accepts. Automaton has 17112 states and 17385 transitions. Word has length 2001 [2021-12-15 09:56:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:35,581 INFO L470 AbstractCegarLoop]: Abstraction has 17112 states and 17385 transitions. [2021-12-15 09:56:35,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 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 09:56:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 17112 states and 17385 transitions. [2021-12-15 09:56:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2043 [2021-12-15 09:56:35,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:35,613 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:35,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:35,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:35,833 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash 98929778, now seen corresponding path program 1 times [2021-12-15 09:56:35,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:35,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012287711] [2021-12-15 09:56:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:35,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9214 backedges. 6781 proven. 78 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [2021-12-15 09:56:36,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012287711] [2021-12-15 09:56:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012287711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961381556] [2021-12-15 09:56:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:36,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:36,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:36,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:56:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:56:36,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9214 backedges. 5258 proven. 0 refuted. 0 times theorem prover too weak. 3956 trivial. 0 not checked. [2021-12-15 09:56:39,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961381556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:39,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:39,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-15 09:56:39,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130918298] [2021-12-15 09:56:39,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:39,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:56:39,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:56:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:56:39,211 INFO L87 Difference]: Start difference. First operand 17112 states and 17385 transitions. Second operand has 4 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 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 09:56:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:40,349 INFO L93 Difference]: Finished difference Result 35209 states and 35778 transitions. [2021-12-15 09:56:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:56:40,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 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 2042 [2021-12-15 09:56:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:40,368 INFO L225 Difference]: With dead ends: 35209 [2021-12-15 09:56:40,368 INFO L226 Difference]: Without dead ends: 18428 [2021-12-15 09:56:40,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2047 GetRequests, 2041 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:56:40,380 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 725 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:40,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 56 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:56:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18428 states. [2021-12-15 09:56:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18428 to 17770. [2021-12-15 09:56:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17770 states, 17769 states have (on average 1.0161517249141763) internal successors, (18056), 17769 states have internal predecessors, (18056), 0 states have call successors, (0), 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 09:56:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17770 states to 17770 states and 18056 transitions. [2021-12-15 09:56:40,539 INFO L78 Accepts]: Start accepts. Automaton has 17770 states and 18056 transitions. Word has length 2042 [2021-12-15 09:56:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:40,540 INFO L470 AbstractCegarLoop]: Abstraction has 17770 states and 18056 transitions. [2021-12-15 09:56:40,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 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 09:56:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17770 states and 18056 transitions. [2021-12-15 09:56:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2172 [2021-12-15 09:56:40,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:40,573 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:40,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:40,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-15 09:56:40,792 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1900803122, now seen corresponding path program 1 times [2021-12-15 09:56:40,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:40,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824290769] [2021-12-15 09:56:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:40,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9880 backedges. 7265 proven. 78 refuted. 0 times theorem prover too weak. 2537 trivial. 0 not checked. [2021-12-15 09:56:41,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824290769] [2021-12-15 09:56:41,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824290769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726086990] [2021-12-15 09:56:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:41,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:41,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:56:41,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:56:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:41,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9880 backedges. 5709 proven. 0 refuted. 0 times theorem prover too weak. 4171 trivial. 0 not checked. [2021-12-15 09:56:44,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:44,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726086990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:44,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:44,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 09:56:44,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010988765] [2021-12-15 09:56:44,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:44,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:44,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:44,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:44,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:44,816 INFO L87 Difference]: Start difference. First operand 17770 states and 18056 transitions. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 09:56:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:45,644 INFO L93 Difference]: Finished difference Result 37183 states and 37772 transitions. [2021-12-15 09:56:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 2171 [2021-12-15 09:56:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:45,660 INFO L225 Difference]: With dead ends: 37183 [2021-12-15 09:56:45,661 INFO L226 Difference]: Without dead ends: 19744 [2021-12-15 09:56:45,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2176 GetRequests, 2171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:45,671 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 253 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:45,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 417 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-12-15 09:56:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 18757. [2021-12-15 09:56:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18757 states, 18756 states have (on average 1.0152484538281084) internal successors, (19042), 18756 states have internal predecessors, (19042), 0 states have call successors, (0), 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 09:56:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18757 states to 18757 states and 19042 transitions. [2021-12-15 09:56:45,814 INFO L78 Accepts]: Start accepts. Automaton has 18757 states and 19042 transitions. Word has length 2171 [2021-12-15 09:56:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:45,814 INFO L470 AbstractCegarLoop]: Abstraction has 18757 states and 19042 transitions. [2021-12-15 09:56:45,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 09:56:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 18757 states and 19042 transitions. [2021-12-15 09:56:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2265 [2021-12-15 09:56:45,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:45,844 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:56:45,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-15 09:56:46,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:46,059 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2113993803, now seen corresponding path program 1 times [2021-12-15 09:56:46,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:46,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117992479] [2021-12-15 09:56:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:46,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat