./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/array-examples/standard_sentinel-2.i -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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:12:39,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:12:39,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:12:39,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:12:39,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:12:39,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:12:39,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:12:39,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:12:39,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:12:39,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:12:39,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:12:39,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:12:39,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:12:39,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:12:39,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:12:39,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:12:39,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:12:39,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:12:39,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:12:39,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:12:39,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:12:39,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:12:39,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:12:39,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:12:39,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:12:39,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:12:39,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:12:39,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:12:39,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:12:39,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:12:39,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:12:39,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:12:39,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:12:39,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:12:39,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:12:39,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:12:39,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:12:39,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:12:39,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:12:39,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:12:39,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:12:39,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:12:39,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:12:39,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:12:39,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:12:39,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:12:39,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:12:39,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:12:39,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:12:39,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:12:39,157 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:12:39,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:12:39,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:12:39,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:12:39,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:12:39,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:12:39,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:12:39,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:12:39,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:12:39,159 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:12:39,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:12:39,159 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:12:39,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:12:39,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:12:39,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:12:39,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:12:39,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:12:39,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:12:39,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:12:39,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:12:39,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:12:39,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:12:39,160 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:12:39,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:12:39,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:12:39,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:12:39,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2021-12-14 11:12:39,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:12:39,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:12:39,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:12:39,384 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:12:39,384 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:12:39,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-12-14 11:12:39,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ee689f7/b66c6fc9389a4616bcc000400afaf460/FLAGbfbb86c23 [2021-12-14 11:12:39,794 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:12:39,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-12-14 11:12:39,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ee689f7/b66c6fc9389a4616bcc000400afaf460/FLAGbfbb86c23 [2021-12-14 11:12:39,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13ee689f7/b66c6fc9389a4616bcc000400afaf460 [2021-12-14 11:12:39,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:12:39,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:12:39,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:12:39,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:12:39,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:12:39,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:39,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536953a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39, skipping insertion in model container [2021-12-14 11:12:39,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:39,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:12:39,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:12:39,941 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/array-examples/standard_sentinel-2.i[852,865] [2021-12-14 11:12:39,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:12:39,952 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:12:39,963 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/array-examples/standard_sentinel-2.i[852,865] [2021-12-14 11:12:39,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:12:39,980 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:12:39,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39 WrapperNode [2021-12-14 11:12:39,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:12:39,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:12:39,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:12:39,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:12:39,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:39,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,005 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2021-12-14 11:12:40,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:12:40,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:12:40,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:12:40,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:12:40,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:12:40,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:12:40,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:12:40,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:12:40,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (1/1) ... [2021-12-14 11:12:40,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:12:40,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:40,064 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) [2021-12-14 11:12:40,079 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 [2021-12-14 11:12:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:12:40,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:12:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:12:40,143 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:12:40,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:12:40,230 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:12:40,234 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:12:40,235 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 11:12:40,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:12:40 BoogieIcfgContainer [2021-12-14 11:12:40,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:12:40,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:12:40,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:12:40,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:12:40,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:12:39" (1/3) ... [2021-12-14 11:12:40,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79baa84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:12:40, skipping insertion in model container [2021-12-14 11:12:40,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:39" (2/3) ... [2021-12-14 11:12:40,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79baa84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:12:40, skipping insertion in model container [2021-12-14 11:12:40,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:12:40" (3/3) ... [2021-12-14 11:12:40,246 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2021-12-14 11:12:40,250 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:12:40,250 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:12:40,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:12:40,329 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 [2021-12-14 11:12:40,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:12:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 11:12:40,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:40,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:40,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:40,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash 214135089, now seen corresponding path program 1 times [2021-12-14 11:12:40,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:40,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760126783] [2021-12-14 11:12:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:40,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:12:40,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760126783] [2021-12-14 11:12:40,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760126783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:12:40,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:12:40,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:12:40,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197010435] [2021-12-14 11:12:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:12:40,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:12:40,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:12:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:12:40,518 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:40,535 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-14 11:12:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:12:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-14 11:12:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:40,541 INFO L225 Difference]: With dead ends: 30 [2021-12-14 11:12:40,542 INFO L226 Difference]: Without dead ends: 13 [2021-12-14 11:12:40,543 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 [2021-12-14 11:12:40,548 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:40,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:12:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-14 11:12:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-12-14 11:12:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-14 11:12:40,575 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-14 11:12:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:40,576 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-14 11:12:40,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-14 11:12:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 11:12:40,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:40,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:40,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:12:40,578 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1622702096, now seen corresponding path program 1 times [2021-12-14 11:12:40,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:40,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001023893] [2021-12-14 11:12:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:40,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:12:40,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001023893] [2021-12-14 11:12:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001023893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:12:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064513466] [2021-12-14 11:12:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:40,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:40,643 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) [2021-12-14 11:12:40,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:12:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:12:40,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:12:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:12:40,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:12:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:12:40,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064513466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:12:40,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:12:40,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 11:12:40,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982000818] [2021-12-14 11:12:40,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:12:40,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:12:40,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:12:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:12:40,806 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:40,833 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-12-14 11:12:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:12:40,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 11 [2021-12-14 11:12:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:40,842 INFO L225 Difference]: With dead ends: 25 [2021-12-14 11:12:40,843 INFO L226 Difference]: Without dead ends: 18 [2021-12-14 11:12:40,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:12:40,844 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:40,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:12:40,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-14 11:12:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-14 11:12:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-14 11:12:40,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2021-12-14 11:12:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:40,853 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-14 11:12:40,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-14 11:12:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 11:12:40,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:40,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:40,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 11:12:41,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:41,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash 49509066, now seen corresponding path program 2 times [2021-12-14 11:12:41,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127414769] [2021-12-14 11:12:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:41,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 11:12:41,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:41,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127414769] [2021-12-14 11:12:41,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127414769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:12:41,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:12:41,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:12:41,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770464254] [2021-12-14 11:12:41,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:12:41,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:12:41,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:12:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:12:41,134 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:41,146 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-14 11:12:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:12:41,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 17 [2021-12-14 11:12:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:41,147 INFO L225 Difference]: With dead ends: 24 [2021-12-14 11:12:41,147 INFO L226 Difference]: Without dead ends: 20 [2021-12-14 11:12:41,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:12:41,148 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:41,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:12:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-14 11:12:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-14 11:12:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-14 11:12:41,151 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-12-14 11:12:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:41,151 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-14 11:12:41,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-14 11:12:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 11:12:41,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:41,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:41,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 11:12:41,152 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash 382246981, now seen corresponding path program 1 times [2021-12-14 11:12:41,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:41,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925589325] [2021-12-14 11:12:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:41,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:12:41,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:41,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925589325] [2021-12-14 11:12:41,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925589325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:12:41,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422877940] [2021-12-14 11:12:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:41,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:41,211 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) [2021-12-14 11:12:41,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:12:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:12:41,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:12:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:12:41,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:12:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:12:41,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422877940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:12:41,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:12:41,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-14 11:12:41,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74588520] [2021-12-14 11:12:41,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:12:41,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 11:12:41,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 11:12:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:12:41,342 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:41,367 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-12-14 11:12:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:12:41,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-12-14 11:12:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:41,368 INFO L225 Difference]: With dead ends: 41 [2021-12-14 11:12:41,368 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 11:12:41,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:12:41,369 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:41,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:12:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 11:12:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-14 11:12:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-14 11:12:41,373 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2021-12-14 11:12:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-14 11:12:41,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-14 11:12:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 11:12:41,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:41,374 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:41,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 11:12:41,589 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,SelfDestructingSolverStorable3 [2021-12-14 11:12:41,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:41,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:41,590 INFO L85 PathProgramCache]: Analyzing trace with hash 822799929, now seen corresponding path program 2 times [2021-12-14 11:12:41,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:41,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361034996] [2021-12-14 11:12:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:41,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:12:41,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:41,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361034996] [2021-12-14 11:12:41,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361034996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:12:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886548633] [2021-12-14 11:12:41,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:12:41,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:41,708 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) [2021-12-14 11:12:41,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:12:41,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:12:41,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:12:41,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:12:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:12:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:12:41,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:12:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:12:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886548633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:12:42,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:12:42,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-14 11:12:42,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061889426] [2021-12-14 11:12:42,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:12:42,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 11:12:42,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 11:12:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:12:42,032 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:42,084 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-12-14 11:12:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 11:12:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-14 11:12:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:42,085 INFO L225 Difference]: With dead ends: 65 [2021-12-14 11:12:42,086 INFO L226 Difference]: Without dead ends: 56 [2021-12-14 11:12:42,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:12:42,087 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:42,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:12:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-14 11:12:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-14 11:12:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-14 11:12:42,091 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2021-12-14 11:12:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:42,091 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-14 11:12:42,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-14 11:12:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 11:12:42,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:42,092 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:42,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 11:12:42,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:42,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash 798531617, now seen corresponding path program 3 times [2021-12-14 11:12:42,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:42,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557863262] [2021-12-14 11:12:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:42,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:12:42,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557863262] [2021-12-14 11:12:42,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557863262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:12:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536521433] [2021-12-14 11:12:42,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:12:42,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:42,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:42,581 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) [2021-12-14 11:12:42,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:12:42,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 11:12:42,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:12:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 11:12:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:12:42,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 11:12:42,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:12:42,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-14 11:12:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-14 11:12:42,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:12:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-14 11:12:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536521433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:12:42,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:12:42,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2021-12-14 11:12:42,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388482814] [2021-12-14 11:12:42,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:12:42,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 11:12:42,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 11:12:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-12-14 11:12:42,948 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:43,112 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-12-14 11:12:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 11:12:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 11:12:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:43,113 INFO L225 Difference]: With dead ends: 76 [2021-12-14 11:12:43,114 INFO L226 Difference]: Without dead ends: 63 [2021-12-14 11:12:43,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 11:12:43,119 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:43,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:12:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-14 11:12:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-12-14 11:12:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-12-14 11:12:43,125 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2021-12-14 11:12:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:43,125 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-12-14 11:12:43,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-12-14 11:12:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 11:12:43,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:43,126 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:43,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:12:43,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:43,333 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash 498607765, now seen corresponding path program 4 times [2021-12-14 11:12:43,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:43,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601881096] [2021-12-14 11:12:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:43,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:12:43,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601881096] [2021-12-14 11:12:43,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601881096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:12:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203907670] [2021-12-14 11:12:43,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:12:43,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:43,728 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) [2021-12-14 11:12:43,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:12:43,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:12:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:12:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 11:12:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:12:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:12:43,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:12:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:12:44,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203907670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:12:44,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:12:44,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-14 11:12:44,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403302864] [2021-12-14 11:12:44,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:12:44,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-14 11:12:44,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:44,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-14 11:12:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 11:12:44,568 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:44,680 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2021-12-14 11:12:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-14 11:12:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-14 11:12:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:44,684 INFO L225 Difference]: With dead ends: 125 [2021-12-14 11:12:44,684 INFO L226 Difference]: Without dead ends: 112 [2021-12-14 11:12:44,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 11:12:44,685 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:44,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 26 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:12:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-14 11:12:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-14 11:12:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-12-14 11:12:44,692 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2021-12-14 11:12:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:44,693 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-12-14 11:12:44,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-12-14 11:12:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 11:12:44,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:44,694 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:44,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:12:44,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:44,919 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash -804209501, now seen corresponding path program 5 times [2021-12-14 11:12:44,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:44,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196169710] [2021-12-14 11:12:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:44,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:12:45,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:45,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196169710] [2021-12-14 11:12:45,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196169710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:12:45,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16817293] [2021-12-14 11:12:45,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:12:45,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:45,850 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) [2021-12-14 11:12:45,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:12:53,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-12-14 11:12:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:12:53,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 11:12:53,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:12:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:12:53,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:12:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:12:55,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16817293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:12:55,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:12:55,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-14 11:12:55,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739335097] [2021-12-14 11:12:55,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:12:55,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-14 11:12:55,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:12:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-14 11:12:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-14 11:12:55,952 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:12:56,173 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-12-14 11:12:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-14 11:12:56,174 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 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 111 [2021-12-14 11:12:56,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:12:56,178 INFO L225 Difference]: With dead ends: 225 [2021-12-14 11:12:56,178 INFO L226 Difference]: Without dead ends: 212 [2021-12-14 11:12:56,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-14 11:12:56,181 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:12:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:12:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-14 11:12:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-14 11:12:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2021-12-14 11:12:56,207 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2021-12-14 11:12:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:12:56,207 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2021-12-14 11:12:56,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:12:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2021-12-14 11:12:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-14 11:12:56,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:12:56,211 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:12:56,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 11:12:56,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:56,426 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:12:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:12:56,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1800984001, now seen corresponding path program 6 times [2021-12-14 11:12:56,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:12:56,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109753785] [2021-12-14 11:12:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:12:56,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:12:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:12:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:12:58,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:12:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109753785] [2021-12-14 11:12:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109753785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:12:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99617763] [2021-12-14 11:12:58,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 11:12:58,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:12:58,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:12:58,637 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) [2021-12-14 11:12:58,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:12:58,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-14 11:12:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:12:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 11:12:58,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:12:58,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 11:12:59,328 INFO L354 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2021-12-14 11:12:59,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 59 [2021-12-14 11:12:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-14 11:12:59,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-14 11:13:00,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99617763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:00,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:00,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 10, 10] total 116 [2021-12-14 11:13:00,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329245284] [2021-12-14 11:13:00,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:00,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-14 11:13:00,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-14 11:13:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5114, Invalid=8226, Unknown=0, NotChecked=0, Total=13340 [2021-12-14 11:13:00,353 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:01,358 INFO L93 Difference]: Finished difference Result 238 states and 243 transitions. [2021-12-14 11:13:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-14 11:13:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 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 211 [2021-12-14 11:13:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:01,359 INFO L225 Difference]: With dead ends: 238 [2021-12-14 11:13:01,359 INFO L226 Difference]: Without dead ends: 221 [2021-12-14 11:13:01,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 406 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5176, Invalid=9830, Unknown=0, NotChecked=0, Total=15006 [2021-12-14 11:13:01,362 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:01,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 66 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 329 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2021-12-14 11:13:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-14 11:13:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2021-12-14 11:13:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2021-12-14 11:13:01,382 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 211 [2021-12-14 11:13:01,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:01,382 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2021-12-14 11:13:01,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2021-12-14 11:13:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-14 11:13:01,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:01,384 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:01,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:01,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:01,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:01,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:01,585 INFO L85 PathProgramCache]: Analyzing trace with hash -43122706, now seen corresponding path program 7 times [2021-12-14 11:13:01,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:01,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940202027] [2021-12-14 11:13:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:01,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 11:13:04,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:04,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940202027] [2021-12-14 11:13:04,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940202027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:04,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331768172] [2021-12-14 11:13:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 11:13:04,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:04,125 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) [2021-12-14 11:13:04,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:13:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-14 11:13:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 11:13:04,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 11:13:12,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331768172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:12,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:12,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-14 11:13:12,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419097294] [2021-12-14 11:13:12,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:12,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-14 11:13:12,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-14 11:13:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-14 11:13:12,261 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:12,768 INFO L93 Difference]: Finished difference Result 441 states and 543 transitions. [2021-12-14 11:13:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-14 11:13:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 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 219 [2021-12-14 11:13:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:12,770 INFO L225 Difference]: With dead ends: 441 [2021-12-14 11:13:12,770 INFO L226 Difference]: Without dead ends: 422 [2021-12-14 11:13:12,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-14 11:13:12,773 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:12,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 34 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 11:13:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-14 11:13:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2021-12-14 11:13:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.004750593824228) internal successors, (423), 421 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 423 transitions. [2021-12-14 11:13:12,784 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 423 transitions. Word has length 219 [2021-12-14 11:13:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:12,785 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 423 transitions. [2021-12-14 11:13:12,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 423 transitions. [2021-12-14 11:13:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-14 11:13:12,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:12,791 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:12,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-14 11:13:13,007 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,SelfDestructingSolverStorable9 [2021-12-14 11:13:13,007 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1310128924, now seen corresponding path program 8 times [2021-12-14 11:13:13,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:13,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030922730] [2021-12-14 11:13:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:13,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 11:13:20,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030922730] [2021-12-14 11:13:20,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030922730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581031467] [2021-12-14 11:13:20,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:13:20,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:20,726 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) [2021-12-14 11:13:20,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 11:13:21,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:13:21,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:13:21,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 202 conjunts are in the unsatisfiable core [2021-12-14 11:13:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 11:13:21,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 11:13:46,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581031467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:46,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:46,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2021-12-14 11:13:46,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805263243] [2021-12-14 11:13:46,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:46,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-12-14 11:13:46,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-12-14 11:13:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-12-14 11:13:46,517 INFO L87 Difference]: Start difference. First operand 422 states and 423 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:49,529 INFO L93 Difference]: Finished difference Result 845 states and 1048 transitions. [2021-12-14 11:13:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-12-14 11:13:49,530 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 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 421 [2021-12-14 11:13:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:49,537 INFO L225 Difference]: With dead ends: 845 [2021-12-14 11:13:49,538 INFO L226 Difference]: Without dead ends: 826 [2021-12-14 11:13:49,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-12-14 11:13:49,546 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 603 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:49,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 66 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 11:13:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-12-14 11:13:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2021-12-14 11:13:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.0024242424242424) internal successors, (827), 825 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 827 transitions. [2021-12-14 11:13:49,560 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 827 transitions. Word has length 421 [2021-12-14 11:13:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:49,560 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 827 transitions. [2021-12-14 11:13:49,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 827 transitions. [2021-12-14 11:13:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2021-12-14 11:13:49,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:49,572 INFO L514 BasicCegarLoop]: trace histogram [402, 402, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:49,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:49,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:49,792 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1528066992, now seen corresponding path program 9 times [2021-12-14 11:13:49,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:49,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553046304] [2021-12-14 11:13:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:49,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat