./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:29:05,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:29:05,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:29:05,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:29:05,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:29:05,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:29:05,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:29:05,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:29:05,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:29:05,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:29:05,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:29:05,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:29:05,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:29:05,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:29:05,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:29:05,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:29:05,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:29:05,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:29:05,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:29:05,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:29:05,282 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:29:05,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:29:05,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:29:05,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:29:05,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:29:05,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:29:05,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:29:05,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:29:05,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:29:05,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:29:05,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:29:05,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:29:05,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:29:05,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:29:05,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:29:05,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:29:05,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:29:05,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:29:05,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:29:05,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:29:05,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:29:05,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:29:05,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:29:05,319 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:29:05,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:29:05,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:29:05,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:29:05,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:29:05,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:29:05,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:29:05,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:29:05,321 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:29:05,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:29:05,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:29:05,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:29:05,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:29:05,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:29:05,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:29:05,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:29:05,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:29:05,323 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:29:05,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:29:05,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:29:05,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:29:05,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:29:05,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:29:05,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:29:05,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:29:05,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:29:05,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:29:05,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:29:05,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:29:05,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:29:05,325 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:29:05,325 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:29:05,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:29:05,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a [2022-07-20 21:29:05,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:29:05,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:29:05,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:29:05,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:29:05,529 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:29:05,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum2.c [2022-07-20 21:29:05,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c549a6e9f/26dbf314d5474a8ea47b4b776f7539cd/FLAG1578ebe0a [2022-07-20 21:29:05,977 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:29:05,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum2.c [2022-07-20 21:29:05,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c549a6e9f/26dbf314d5474a8ea47b4b776f7539cd/FLAG1578ebe0a [2022-07-20 21:29:06,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c549a6e9f/26dbf314d5474a8ea47b4b776f7539cd [2022-07-20 21:29:06,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:29:06,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:29:06,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:29:06,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:29:06,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:29:06,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b011ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06, skipping insertion in model container [2022-07-20 21:29:06,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:29:06,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:29:06,174 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-crafted/zero_sum2.c[400,413] [2022-07-20 21:29:06,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:29:06,200 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:29:06,212 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-crafted/zero_sum2.c[400,413] [2022-07-20 21:29:06,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:29:06,237 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:29:06,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06 WrapperNode [2022-07-20 21:29:06,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:29:06,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:29:06,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:29:06,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:29:06,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,269 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-07-20 21:29:06,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:29:06,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:29:06,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:29:06,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:29:06,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:29:06,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:29:06,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:29:06,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:29:06,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (1/1) ... [2022-07-20 21:29:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:29:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:06,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:29:06,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:29:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:29:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:29:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:29:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:29:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:29:06,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:29:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:29:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:29:06,477 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:29:06,479 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:29:06,640 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:29:06,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:29:06,651 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-20 21:29:06,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:29:06 BoogieIcfgContainer [2022-07-20 21:29:06,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:29:06,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:29:06,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:29:06,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:29:06,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:29:06" (1/3) ... [2022-07-20 21:29:06,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563c4116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:29:06, skipping insertion in model container [2022-07-20 21:29:06,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:29:06" (2/3) ... [2022-07-20 21:29:06,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563c4116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:29:06, skipping insertion in model container [2022-07-20 21:29:06,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:29:06" (3/3) ... [2022-07-20 21:29:06,674 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2022-07-20 21:29:06,684 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:29:06,687 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:29:06,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:29:06,751 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@620f6a83, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@16221b1b [2022-07-20 21:29:06,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:29:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 21:29:06,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:06,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:06,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-07-20 21:29:06,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182771904] [2022-07-20 21:29:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182771904] [2022-07-20 21:29:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182771904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:29:06,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:29:06,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:29:06,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155480370] [2022-07-20 21:29:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:29:06,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:29:06,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:29:06,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:29:06,911 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:06,923 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-07-20 21:29:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:29:06,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-07-20 21:29:06,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:06,930 INFO L225 Difference]: With dead ends: 47 [2022-07-20 21:29:06,930 INFO L226 Difference]: Without dead ends: 21 [2022-07-20 21:29:06,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:29:06,940 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:06,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:29:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-20 21:29:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-20 21:29:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-20 21:29:06,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-07-20 21:29:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:06,963 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-20 21:29:06,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-20 21:29:06,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 21:29:06,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:06,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:06,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:29:06,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-07-20 21:29:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:06,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526596308] [2022-07-20 21:29:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:06,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:07,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:07,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526596308] [2022-07-20 21:29:07,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526596308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:29:07,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:29:07,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:29:07,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539907848] [2022-07-20 21:29:07,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:29:07,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:29:07,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:07,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:29:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:29:07,053 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:07,082 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-20 21:29:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:29:07,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-07-20 21:29:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:07,084 INFO L225 Difference]: With dead ends: 39 [2022-07-20 21:29:07,084 INFO L226 Difference]: Without dead ends: 23 [2022-07-20 21:29:07,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:29:07,088 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:07,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:29:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-20 21:29:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-20 21:29:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-20 21:29:07,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-07-20 21:29:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:07,095 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-20 21:29:07,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-20 21:29:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 21:29:07,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:07,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:07,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:29:07,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:07,099 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2022-07-20 21:29:07,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:07,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149741812] [2022-07-20 21:29:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:07,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:29:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149741812] [2022-07-20 21:29:07,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149741812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:29:07,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:29:07,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:29:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742413900] [2022-07-20 21:29:07,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:29:07,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:29:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:29:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:29:07,158 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:07,204 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-07-20 21:29:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:29:07,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-07-20 21:29:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:07,206 INFO L225 Difference]: With dead ends: 43 [2022-07-20 21:29:07,206 INFO L226 Difference]: Without dead ends: 30 [2022-07-20 21:29:07,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:29:07,212 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:07,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:29:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-20 21:29:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-20 21:29:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-20 21:29:07,220 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-20 21:29:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:07,220 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-20 21:29:07,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-20 21:29:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 21:29:07,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:07,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 21:29:07,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2022-07-20 21:29:07,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:07,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731895640] [2022-07-20 21:29:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:07,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:29:07,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731895640] [2022-07-20 21:29:07,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731895640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115308565] [2022-07-20 21:29:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:07,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:07,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:07,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:07,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:29:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:29:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:29:07,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:29:07,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115308565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:07,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:07,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 21:29:07,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221080066] [2022-07-20 21:29:07,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:07,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 21:29:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 21:29:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:29:07,423 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:07,445 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-20 21:29:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:29:07,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 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 25 [2022-07-20 21:29:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:07,446 INFO L225 Difference]: With dead ends: 49 [2022-07-20 21:29:07,446 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:29:07,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:29:07,447 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:07,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:29:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:29:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-20 21:29:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-20 21:29:07,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2022-07-20 21:29:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:07,451 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-20 21:29:07,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-20 21:29:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:29:07,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:07,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:07,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:07,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:07,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2022-07-20 21:29:07,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943474176] [2022-07-20 21:29:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:07,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:29:07,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:07,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943474176] [2022-07-20 21:29:07,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943474176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:07,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087141670] [2022-07-20 21:29:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:29:07,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:07,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:07,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:07,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:29:07,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:29:07,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:07,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:29:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:29:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:29:07,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087141670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:07,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:07,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-20 21:29:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000333538] [2022-07-20 21:29:07,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:07,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:29:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:29:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:29:07,894 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:07,956 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-20 21:29:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 21:29:07,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 21:29:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:07,957 INFO L225 Difference]: With dead ends: 56 [2022-07-20 21:29:07,957 INFO L226 Difference]: Without dead ends: 40 [2022-07-20 21:29:07,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:29:07,958 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:07,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:07,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-20 21:29:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-07-20 21:29:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-20 21:29:07,962 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-07-20 21:29:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:07,962 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-20 21:29:07,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-20 21:29:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:29:07,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:07,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:07,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:08,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:08,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:08,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2022-07-20 21:29:08,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:08,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797132069] [2022-07-20 21:29:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:08,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:08,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797132069] [2022-07-20 21:29:08,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797132069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453519398] [2022-07-20 21:29:08,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:29:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:08,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:08,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:08,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:29:08,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:29:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 21:29:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:09,866 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:29:09,867 INFO L390 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 15 treesize of output 16 [2022-07-20 21:29:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:10,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:13,561 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:29:13,561 INFO L390 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 36 treesize of output 93 [2022-07-20 21:29:13,945 INFO L356 Elim1Store]: treesize reduction 40, result has 52.9 percent of original size [2022-07-20 21:29:13,945 INFO L390 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 37 treesize of output 54 [2022-07-20 21:29:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:14,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453519398] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:14,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:14,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 28] total 63 [2022-07-20 21:29:14,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875156245] [2022-07-20 21:29:14,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 21:29:14,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 21:29:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3507, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 21:29:14,347 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 63 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:15,829 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2022-07-20 21:29:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 21:29:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 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 35 [2022-07-20 21:29:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:15,831 INFO L225 Difference]: With dead ends: 99 [2022-07-20 21:29:15,831 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 21:29:15,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 23 SyntacticMatches, 16 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=786, Invalid=7046, Unknown=0, NotChecked=0, Total=7832 [2022-07-20 21:29:15,836 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:15,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 117 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 453 Invalid, 0 Unknown, 688 Unchecked, 0.2s Time] [2022-07-20 21:29:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 21:29:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2022-07-20 21:29:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-07-20 21:29:15,861 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2022-07-20 21:29:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:15,862 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-07-20 21:29:15,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-07-20 21:29:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 21:29:15,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:15,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:15,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:16,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:16,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2022-07-20 21:29:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:16,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637339539] [2022-07-20 21:29:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:29:16,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637339539] [2022-07-20 21:29:16,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637339539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258335304] [2022-07-20 21:29:16,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:29:16,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:16,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:16,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:16,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:29:16,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:29:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:16,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:29:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:29:16,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:29:16,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258335304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:16,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:16,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:29:16,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094854148] [2022-07-20 21:29:16,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:16,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:29:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:29:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:29:16,334 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:16,422 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-07-20 21:29:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:29:16,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-20 21:29:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:16,424 INFO L225 Difference]: With dead ends: 113 [2022-07-20 21:29:16,424 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 21:29:16,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:29:16,440 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:16,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 21:29:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-20 21:29:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-07-20 21:29:16,457 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 37 [2022-07-20 21:29:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:16,458 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-07-20 21:29:16,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-07-20 21:29:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:29:16,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:16,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:16,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:16,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:16,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2022-07-20 21:29:16,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:16,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173513551] [2022-07-20 21:29:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:16,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 21:29:16,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173513551] [2022-07-20 21:29:16,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173513551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647806870] [2022-07-20 21:29:16,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:29:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:16,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:16,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:29:16,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 21:29:16,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:29:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 21:29:16,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 21:29:16,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647806870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:16,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:16,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:29:16,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689149144] [2022-07-20 21:29:16,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:16,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:29:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:29:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:29:16,896 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:17,057 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2022-07-20 21:29:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 21:29:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 21:29:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:17,058 INFO L225 Difference]: With dead ends: 99 [2022-07-20 21:29:17,058 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 21:29:17,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:29:17,059 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:17,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 29 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 21:29:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-20 21:29:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-20 21:29:17,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-07-20 21:29:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:17,063 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-20 21:29:17,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-20 21:29:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 21:29:17,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:17,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:17,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 21:29:17,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:17,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:17,299 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2022-07-20 21:29:17,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:17,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359329751] [2022-07-20 21:29:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:17,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:18,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:18,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359329751] [2022-07-20 21:29:18,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359329751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:18,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642470777] [2022-07-20 21:29:18,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:29:18,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:18,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:18,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:18,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:29:18,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 21:29:18,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:18,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 21:29:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:19,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:20,574 INFO L356 Elim1Store]: treesize reduction 87, result has 57.8 percent of original size [2022-07-20 21:29:20,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 129 [2022-07-20 21:29:21,344 INFO L356 Elim1Store]: treesize reduction 145, result has 29.6 percent of original size [2022-07-20 21:29:21,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 72 [2022-07-20 21:29:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:21,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642470777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:21,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:21,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 27, 26] total 73 [2022-07-20 21:29:21,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700862956] [2022-07-20 21:29:21,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:21,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 21:29:21,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 21:29:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 21:29:21,758 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 73 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:23,110 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-07-20 21:29:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 21:29:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 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 45 [2022-07-20 21:29:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:23,111 INFO L225 Difference]: With dead ends: 81 [2022-07-20 21:29:23,111 INFO L226 Difference]: Without dead ends: 77 [2022-07-20 21:29:23,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3228 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=780, Invalid=7776, Unknown=0, NotChecked=0, Total=8556 [2022-07-20 21:29:23,113 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:23,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1356 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2022-07-20 21:29:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-20 21:29:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-07-20 21:29:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-07-20 21:29:23,119 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2022-07-20 21:29:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:23,119 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-07-20 21:29:23,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-07-20 21:29:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 21:29:23,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:23,135 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:23,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-20 21:29:23,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:23,348 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2022-07-20 21:29:23,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:23,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536195358] [2022-07-20 21:29:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 21:29:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536195358] [2022-07-20 21:29:23,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536195358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23443833] [2022-07-20 21:29:23,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:29:23,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:23,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:23,441 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) [2022-07-20 21:29:23,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:29:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:29:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 21:29:23,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 21:29:23,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23443833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:23,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:23,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 21:29:23,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423594845] [2022-07-20 21:29:23,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:23,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:29:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:29:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:29:23,612 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:23,751 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-07-20 21:29:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:29:23,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 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 47 [2022-07-20 21:29:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:23,754 INFO L225 Difference]: With dead ends: 132 [2022-07-20 21:29:23,754 INFO L226 Difference]: Without dead ends: 70 [2022-07-20 21:29:23,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:29:23,756 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:23,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-20 21:29:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-07-20 21:29:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-07-20 21:29:23,768 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2022-07-20 21:29:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:23,769 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-07-20 21:29:23,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-07-20 21:29:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 21:29:23,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:23,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:23,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:23,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:23,990 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2022-07-20 21:29:23,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:23,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041647133] [2022-07-20 21:29:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:23,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:29:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:24,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041647133] [2022-07-20 21:29:24,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041647133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:24,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105396625] [2022-07-20 21:29:24,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:29:24,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:24,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:24,075 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) [2022-07-20 21:29:24,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:29:24,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:29:24,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:24,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:29:24,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:29:24,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:29:24,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105396625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:24,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:24,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 21:29:24,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141900101] [2022-07-20 21:29:24,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:29:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:29:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:29:24,249 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:24,399 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-07-20 21:29:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:29:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2022-07-20 21:29:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:24,401 INFO L225 Difference]: With dead ends: 101 [2022-07-20 21:29:24,401 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 21:29:24,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:29:24,403 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:24,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 31 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 21:29:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-07-20 21:29:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-07-20 21:29:24,416 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-07-20 21:29:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:24,417 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-07-20 21:29:24,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-07-20 21:29:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:29:24,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:24,420 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:24,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:29:24,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2022-07-20 21:29:24,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:24,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141441130] [2022-07-20 21:29:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:26,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141441130] [2022-07-20 21:29:26,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141441130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454470755] [2022-07-20 21:29:26,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:29:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:26,343 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) [2022-07-20 21:29:26,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:29:26,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:29:26,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-20 21:29:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:26,451 INFO L390 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 [2022-07-20 21:29:30,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:29:30,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:29:30,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:29:30,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:29:30,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:29:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:29:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:29:30,738 INFO L356 Elim1Store]: treesize reduction 102, result has 59.0 percent of original size [2022-07-20 21:29:30,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 125 treesize of output 171 [2022-07-20 21:29:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:29:31,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:29:35,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454470755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:35,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:35,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 26, 23] total 83 [2022-07-20 21:29:35,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679140558] [2022-07-20 21:29:35,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:35,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-20 21:29:35,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-20 21:29:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=6342, Unknown=1, NotChecked=0, Total=6806 [2022-07-20 21:29:35,102 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 83 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 83 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:39,200 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-07-20 21:29:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 21:29:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 83 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-20 21:29:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:39,201 INFO L225 Difference]: With dead ends: 92 [2022-07-20 21:29:39,201 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 21:29:39,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 56 SyntacticMatches, 16 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1064, Invalid=14685, Unknown=1, NotChecked=0, Total=15750 [2022-07-20 21:29:39,204 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:39,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 167 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 815 Invalid, 0 Unknown, 616 Unchecked, 0.4s Time] [2022-07-20 21:29:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 21:29:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2022-07-20 21:29:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-07-20 21:29:39,211 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2022-07-20 21:29:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:39,211 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-07-20 21:29:39,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 83 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-07-20 21:29:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 21:29:39,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:39,212 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:39,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:39,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:39,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:39,413 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2022-07-20 21:29:39,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:39,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059628291] [2022-07-20 21:29:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:39,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-20 21:29:39,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:39,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059628291] [2022-07-20 21:29:39,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059628291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:39,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794621721] [2022-07-20 21:29:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:29:39,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:39,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:39,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:29:39,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:29:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:29:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-20 21:29:39,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-20 21:29:39,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794621721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:39,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:39,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-20 21:29:39,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126120000] [2022-07-20 21:29:39,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:39,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:29:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:29:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:29:39,700 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:39,897 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2022-07-20 21:29:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:29:39,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 57 [2022-07-20 21:29:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:39,898 INFO L225 Difference]: With dead ends: 160 [2022-07-20 21:29:39,898 INFO L226 Difference]: Without dead ends: 84 [2022-07-20 21:29:39,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:29:39,899 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:39,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 71 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-20 21:29:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-07-20 21:29:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-07-20 21:29:39,906 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 57 [2022-07-20 21:29:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:39,906 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-07-20 21:29:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-07-20 21:29:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:29:39,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:39,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:39,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:40,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:29:40,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash -801227688, now seen corresponding path program 11 times [2022-07-20 21:29:40,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:40,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490084902] [2022-07-20 21:29:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:40,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 21:29:40,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490084902] [2022-07-20 21:29:40,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490084902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293353152] [2022-07-20 21:29:40,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:29:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:40,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:40,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:29:40,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 21:29:40,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:29:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 21:29:40,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 21:29:40,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293353152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:40,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:40,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-20 21:29:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469888850] [2022-07-20 21:29:40,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:29:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:29:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:29:40,440 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:40,615 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2022-07-20 21:29:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:29:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-20 21:29:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:40,616 INFO L225 Difference]: With dead ends: 119 [2022-07-20 21:29:40,616 INFO L226 Difference]: Without dead ends: 70 [2022-07-20 21:29:40,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:29:40,616 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:40,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 36 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-20 21:29:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-07-20 21:29:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-20 21:29:40,622 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-07-20 21:29:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:40,622 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-20 21:29:40,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-20 21:29:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 21:29:40,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:40,623 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:40,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 21:29:40,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:29:40,840 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:40,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:40,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2022-07-20 21:29:40,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:40,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332522951] [2022-07-20 21:29:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:29:42,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332522951] [2022-07-20 21:29:42,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332522951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115748363] [2022-07-20 21:29:42,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:29:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:42,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:42,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:29:42,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:29:42,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-20 21:29:42,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:44,743 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:29:44,743 INFO L390 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 35 treesize of output 23 [2022-07-20 21:29:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:29:44,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:49,862 INFO L356 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2022-07-20 21:29:49,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 285 [2022-07-20 21:29:50,625 INFO L356 Elim1Store]: treesize reduction 589, result has 10.5 percent of original size [2022-07-20 21:29:50,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 84 [2022-07-20 21:29:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:29:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115748363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:50,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:50,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 33, 28] total 102 [2022-07-20 21:29:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328437008] [2022-07-20 21:29:50,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:50,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-07-20 21:29:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-07-20 21:29:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=9711, Unknown=0, NotChecked=0, Total=10302 [2022-07-20 21:29:50,882 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 102 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:55,638 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-07-20 21:29:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 21:29:55,639 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-20 21:29:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:55,639 INFO L225 Difference]: With dead ends: 109 [2022-07-20 21:29:55,639 INFO L226 Difference]: Without dead ends: 105 [2022-07-20 21:29:55,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7017 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1334, Invalid=21922, Unknown=0, NotChecked=0, Total=23256 [2022-07-20 21:29:55,641 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 939 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:55,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 184 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1319 Invalid, 0 Unknown, 939 Unchecked, 0.7s Time] [2022-07-20 21:29:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-20 21:29:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2022-07-20 21:29:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-07-20 21:29:55,654 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2022-07-20 21:29:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:55,655 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-07-20 21:29:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-07-20 21:29:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 21:29:55,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:55,656 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:55,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:29:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 21:29:55,871 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2022-07-20 21:29:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:55,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888601228] [2022-07-20 21:29:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 21:29:56,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:56,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888601228] [2022-07-20 21:29:56,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888601228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:56,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601728462] [2022-07-20 21:29:56,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:29:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:56,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:56,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:29:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:29:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 21:29:56,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 21:29:56,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601728462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:56,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:56,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-20 21:29:56,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447775007] [2022-07-20 21:29:56,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:56,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:29:56,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:29:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:29:56,274 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:56,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:56,489 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2022-07-20 21:29:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:29:56,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 21:29:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:56,490 INFO L225 Difference]: With dead ends: 188 [2022-07-20 21:29:56,490 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 21:29:56,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:29:56,491 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:56,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 81 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:29:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 21:29:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-07-20 21:29:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-07-20 21:29:56,502 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 67 [2022-07-20 21:29:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:56,502 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-07-20 21:29:56,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-07-20 21:29:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:29:56,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:56,503 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:56,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-20 21:29:56,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 21:29:56,719 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:56,720 INFO L85 PathProgramCache]: Analyzing trace with hash 721627522, now seen corresponding path program 14 times [2022-07-20 21:29:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:56,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260508343] [2022-07-20 21:29:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:56,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:29:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 21:29:56,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:29:56,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260508343] [2022-07-20 21:29:56,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260508343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:29:56,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336206849] [2022-07-20 21:29:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:29:56,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:56,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:29:56,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:29:56,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:29:56,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:29:56,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:29:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:29:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:29:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 21:29:56,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:29:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 21:29:57,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336206849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:29:57,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:29:57,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-20 21:29:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416152610] [2022-07-20 21:29:57,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:29:57,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:29:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:29:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:29:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:29:57,034 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:29:57,178 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-07-20 21:29:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:29:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-20 21:29:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:29:57,179 INFO L225 Difference]: With dead ends: 137 [2022-07-20 21:29:57,179 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 21:29:57,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2022-07-20 21:29:57,180 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 173 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:29:57,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 35 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:29:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 21:29:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-20 21:29:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-07-20 21:29:57,187 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-07-20 21:29:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:29:57,188 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-07-20 21:29:57,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:29:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-07-20 21:29:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:29:57,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:29:57,188 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:29:57,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-20 21:29:57,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:29:57,402 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:29:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:29:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2022-07-20 21:29:57,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:29:57,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144489582] [2022-07-20 21:29:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:29:57,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:29:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:30:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:30:00,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:30:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144489582] [2022-07-20 21:30:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144489582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:30:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142544448] [2022-07-20 21:30:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:30:00,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:00,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:30:00,215 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:30:00,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:30:00,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 21:30:00,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:30:00,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-20 21:30:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:30:00,338 INFO L390 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 [2022-07-20 21:30:06,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:06,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:30:06,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 109 [2022-07-20 21:30:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:30:06,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:30:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:30:13,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142544448] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:30:13,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:30:13,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 36, 31] total 115 [2022-07-20 21:30:13,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946445742] [2022-07-20 21:30:13,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:30:13,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-07-20 21:30:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:30:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-07-20 21:30:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=902, Invalid=12206, Unknown=2, NotChecked=0, Total=13110 [2022-07-20 21:30:13,785 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 115 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 115 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:30:21,145 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2022-07-20 21:30:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-20 21:30:21,146 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 115 states have internal predecessors, (196), 0 states have call successors, (0), 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 75 [2022-07-20 21:30:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:30:21,146 INFO L225 Difference]: With dead ends: 125 [2022-07-20 21:30:21,146 INFO L226 Difference]: Without dead ends: 121 [2022-07-20 21:30:21,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8636 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1989, Invalid=29161, Unknown=2, NotChecked=0, Total=31152 [2022-07-20 21:30:21,148 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:30:21,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1698 Invalid, 0 Unknown, 897 Unchecked, 0.8s Time] [2022-07-20 21:30:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-20 21:30:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2022-07-20 21:30:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2022-07-20 21:30:21,163 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2022-07-20 21:30:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:30:21,163 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2022-07-20 21:30:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 115 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2022-07-20 21:30:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 21:30:21,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:30:21,164 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:30:21,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:30:21,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 21:30:21,380 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:30:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:30:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2022-07-20 21:30:21,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:30:21,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186276799] [2022-07-20 21:30:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:30:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:30:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:30:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:30:21,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:30:21,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186276799] [2022-07-20 21:30:21,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186276799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:30:21,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113162274] [2022-07-20 21:30:21,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:30:21,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:21,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:30:21,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:30:21,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:30:21,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:30:21,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:30:21,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:30:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:30:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:30:21,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:30:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 21:30:21,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113162274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:30:21,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:30:21,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-20 21:30:21,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806344384] [2022-07-20 21:30:21,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:30:21,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:30:21,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:30:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:30:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:30:21,813 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:30:22,048 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2022-07-20 21:30:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:30:22,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-20 21:30:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:30:22,049 INFO L225 Difference]: With dead ends: 216 [2022-07-20 21:30:22,049 INFO L226 Difference]: Without dead ends: 112 [2022-07-20 21:30:22,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 21:30:22,050 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:30:22,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 69 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:30:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-20 21:30:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-07-20 21:30:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2022-07-20 21:30:22,064 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 77 [2022-07-20 21:30:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:30:22,064 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2022-07-20 21:30:22,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2022-07-20 21:30:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 21:30:22,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:30:22,065 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:30:22,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-20 21:30:22,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:22,280 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:30:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:30:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1623823828, now seen corresponding path program 17 times [2022-07-20 21:30:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:30:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105798484] [2022-07-20 21:30:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:30:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:30:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:30:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:30:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:30:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105798484] [2022-07-20 21:30:22,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105798484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:30:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891121841] [2022-07-20 21:30:22,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:30:22,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:30:22,429 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:30:22,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:30:22,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 21:30:22,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:30:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:30:22,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:30:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:30:22,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:30:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:30:22,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891121841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:30:22,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:30:22,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-20 21:30:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389566484] [2022-07-20 21:30:22,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:30:22,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:30:22,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:30:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:30:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:30:22,960 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:30:23,340 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-07-20 21:30:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:30:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-20 21:30:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:30:23,341 INFO L225 Difference]: With dead ends: 155 [2022-07-20 21:30:23,341 INFO L226 Difference]: Without dead ends: 90 [2022-07-20 21:30:23,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 21:30:23,342 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:30:23,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 50 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:30:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-20 21:30:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-07-20 21:30:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-20 21:30:23,352 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2022-07-20 21:30:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:30:23,352 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-20 21:30:23,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-20 21:30:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 21:30:23,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:30:23,353 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:30:23,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-20 21:30:23,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:23,568 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:30:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:30:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 18 times [2022-07-20 21:30:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:30:23,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818598075] [2022-07-20 21:30:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:30:23,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:30:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:30:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:30:27,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:30:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818598075] [2022-07-20 21:30:27,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818598075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:30:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867494614] [2022-07-20 21:30:27,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:30:27,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:27,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:30:27,528 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:30:27,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:30:27,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 21:30:27,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:30:27,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 134 conjunts are in the unsatisfiable core [2022-07-20 21:30:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:30:34,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:30:34,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:30:34,387 INFO L356 Elim1Store]: treesize reduction 188, result has 62.7 percent of original size [2022-07-20 21:30:34,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 30 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 209 treesize of output 348 [2022-07-20 21:30:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 13 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:30:35,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:30:45,228 INFO L356 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2022-07-20 21:30:45,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 332 [2022-07-20 21:30:45,676 INFO L356 Elim1Store]: treesize reduction 1335, result has 10.8 percent of original size [2022-07-20 21:30:45,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 133 treesize of output 179 [2022-07-20 21:30:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:30:46,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867494614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:30:46,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:30:46,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 38, 36] total 134 [2022-07-20 21:30:46,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255165436] [2022-07-20 21:30:46,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:30:46,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-07-20 21:30:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:30:46,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-07-20 21:30:46,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=16955, Unknown=0, NotChecked=0, Total=17822 [2022-07-20 21:30:46,035 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 134 states, 134 states have (on average 1.671641791044776) internal successors, (224), 134 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:30:59,159 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2022-07-20 21:30:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-20 21:30:59,160 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.671641791044776) internal successors, (224), 134 states have internal predecessors, (224), 0 states have call successors, (0), 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 85 [2022-07-20 21:30:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:30:59,161 INFO L225 Difference]: With dead ends: 140 [2022-07-20 21:30:59,161 INFO L226 Difference]: Without dead ends: 136 [2022-07-20 21:30:59,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 96 SyntacticMatches, 15 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9880 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=2234, Invalid=37966, Unknown=0, NotChecked=0, Total=40200 [2022-07-20 21:30:59,163 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1420 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:30:59,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1294 Invalid, 0 Unknown, 1420 Unchecked, 0.7s Time] [2022-07-20 21:30:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-20 21:30:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2022-07-20 21:30:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-07-20 21:30:59,186 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 85 [2022-07-20 21:30:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:30:59,187 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-07-20 21:30:59,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.671641791044776) internal successors, (224), 134 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:30:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-07-20 21:30:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-20 21:30:59,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:30:59,190 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:30:59,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 21:30:59,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:59,410 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:30:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:30:59,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1371812404, now seen corresponding path program 19 times [2022-07-20 21:30:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:30:59,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065834456] [2022-07-20 21:30:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:30:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:30:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:30:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 21:30:59,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:30:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065834456] [2022-07-20 21:30:59,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065834456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:30:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340155297] [2022-07-20 21:30:59,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:30:59,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:30:59,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:30:59,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:30:59,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:30:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:30:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:30:59,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:30:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 21:30:59,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 21:31:00,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340155297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:00,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:00,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-20 21:31:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041603209] [2022-07-20 21:31:00,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:00,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:31:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:00,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:31:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:31:00,083 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:00,421 INFO L93 Difference]: Finished difference Result 244 states and 258 transitions. [2022-07-20 21:31:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 21:31:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 87 [2022-07-20 21:31:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:00,422 INFO L225 Difference]: With dead ends: 244 [2022-07-20 21:31:00,422 INFO L226 Difference]: Without dead ends: 126 [2022-07-20 21:31:00,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:31:00,423 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:00,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 74 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:31:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-20 21:31:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-07-20 21:31:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.064516129032258) internal successors, (132), 124 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2022-07-20 21:31:00,440 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 87 [2022-07-20 21:31:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:00,441 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2022-07-20 21:31:00,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2022-07-20 21:31:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 21:31:00,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:00,442 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:00,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:00,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:00,658 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1105043030, now seen corresponding path program 20 times [2022-07-20 21:31:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:00,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394852590] [2022-07-20 21:31:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-20 21:31:00,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394852590] [2022-07-20 21:31:00,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394852590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758086496] [2022-07-20 21:31:00,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:31:00,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:00,821 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:31:00,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:31:00,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:00,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:31:00,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-20 21:31:01,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-20 21:31:01,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758086496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:01,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:01,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-20 21:31:01,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772109663] [2022-07-20 21:31:01,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:31:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:31:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:31:01,086 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:01,346 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2022-07-20 21:31:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:31:01,347 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 89 [2022-07-20 21:31:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:01,347 INFO L225 Difference]: With dead ends: 173 [2022-07-20 21:31:01,347 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 21:31:01,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:31:01,348 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 201 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:01,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 30 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:31:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 21:31:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-20 21:31:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-07-20 21:31:01,377 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2022-07-20 21:31:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:01,377 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-07-20 21:31:01,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-07-20 21:31:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-20 21:31:01,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:01,378 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:01,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-20 21:31:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-20 21:31:01,594 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 238506300, now seen corresponding path program 21 times [2022-07-20 21:31:01,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:01,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859451790] [2022-07-20 21:31:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 4 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:06,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:06,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859451790] [2022-07-20 21:31:06,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859451790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:06,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528425617] [2022-07-20 21:31:06,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:31:06,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:06,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:06,834 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:06,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:31:06,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:31:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:06,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 156 conjunts are in the unsatisfiable core [2022-07-20 21:31:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:16,337 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:31:16,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 175 [2022-07-20 21:31:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 295 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:31:16,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:30,516 INFO L356 Elim1Store]: treesize reduction 1329, result has 30.3 percent of original size [2022-07-20 21:31:30,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 147 treesize of output 597 [2022-07-20 21:31:32,239 INFO L356 Elim1Store]: treesize reduction 1673, result has 12.2 percent of original size [2022-07-20 21:31:32,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 254 [2022-07-20 21:31:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:31:32,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528425617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:32,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:32,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 45, 40] total 148 [2022-07-20 21:31:32,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042576380] [2022-07-20 21:31:32,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:32,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-07-20 21:31:32,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-07-20 21:31:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1369, Invalid=20386, Unknown=1, NotChecked=0, Total=21756 [2022-07-20 21:31:32,735 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 148 states, 148 states have (on average 1.662162162162162) internal successors, (246), 148 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:47,761 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2022-07-20 21:31:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-20 21:31:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.662162162162162) internal successors, (246), 148 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-20 21:31:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:47,763 INFO L225 Difference]: With dead ends: 157 [2022-07-20 21:31:47,763 INFO L226 Difference]: Without dead ends: 153 [2022-07-20 21:31:47,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 110 SyntacticMatches, 19 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13573 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=2954, Invalid=47895, Unknown=1, NotChecked=0, Total=50850 [2022-07-20 21:31:47,765 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:47,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 251 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2323 Invalid, 0 Unknown, 1427 Unchecked, 1.2s Time] [2022-07-20 21:31:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-20 21:31:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2022-07-20 21:31:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2022-07-20 21:31:47,790 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 95 [2022-07-20 21:31:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:47,790 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2022-07-20 21:31:47,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.662162162162162) internal successors, (246), 148 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2022-07-20 21:31:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 21:31:47,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:47,791 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:47,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-20 21:31:48,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-20 21:31:48,010 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1624521822, now seen corresponding path program 22 times [2022-07-20 21:31:48,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:48,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478805601] [2022-07-20 21:31:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:48,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-20 21:31:48,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:48,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478805601] [2022-07-20 21:31:48,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478805601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:48,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438534258] [2022-07-20 21:31:48,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:31:48,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:48,228 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:48,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:31:48,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:31:48,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:48,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:31:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-20 21:31:48,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-20 21:31:48,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438534258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:48,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:48,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-20 21:31:48,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187497462] [2022-07-20 21:31:48,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:48,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:31:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:31:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:31:48,633 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:48,920 INFO L93 Difference]: Finished difference Result 272 states and 286 transitions. [2022-07-20 21:31:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:31:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-20 21:31:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:48,922 INFO L225 Difference]: With dead ends: 272 [2022-07-20 21:31:48,922 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 21:31:48,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:31:48,922 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:48,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:31:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 21:31:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-07-20 21:31:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0579710144927537) internal successors, (146), 138 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 146 transitions. [2022-07-20 21:31:48,958 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 146 transitions. Word has length 97 [2022-07-20 21:31:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:48,958 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 146 transitions. [2022-07-20 21:31:48,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 146 transitions. [2022-07-20 21:31:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 21:31:48,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:48,959 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:48,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-20 21:31:49,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:49,175 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:49,176 INFO L85 PathProgramCache]: Analyzing trace with hash 125199872, now seen corresponding path program 23 times [2022-07-20 21:31:49,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:49,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333578049] [2022-07-20 21:31:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:49,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-20 21:31:49,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333578049] [2022-07-20 21:31:49,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333578049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109521021] [2022-07-20 21:31:49,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:31:49,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:49,345 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:49,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 21:31:49,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-20 21:31:49,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:49,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:31:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-20 21:31:49,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-20 21:31:49,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109521021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:49,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:49,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-20 21:31:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900983045] [2022-07-20 21:31:49,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:31:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:31:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:31:49,746 INFO L87 Difference]: Start difference. First operand 139 states and 146 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:50,083 INFO L93 Difference]: Finished difference Result 191 states and 203 transitions. [2022-07-20 21:31:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:31:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-20 21:31:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:50,084 INFO L225 Difference]: With dead ends: 191 [2022-07-20 21:31:50,084 INFO L226 Difference]: Without dead ends: 110 [2022-07-20 21:31:50,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=522, Invalid=1284, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:31:50,085 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 282 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:50,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 42 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:31:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-20 21:31:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2022-07-20 21:31:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-07-20 21:31:50,104 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2022-07-20 21:31:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:50,105 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-07-20 21:31:50,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-07-20 21:31:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-20 21:31:50,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:50,105 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:50,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:50,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:50,323 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1992502938, now seen corresponding path program 24 times [2022-07-20 21:31:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:50,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379401919] [2022-07-20 21:31:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 25 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:56,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:56,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379401919] [2022-07-20 21:31:56,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379401919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:56,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633144381] [2022-07-20 21:31:56,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:31:56,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:56,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:56,630 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:56,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 21:31:56,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-20 21:31:56,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:56,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 176 conjunts are in the unsatisfiable core [2022-07-20 21:31:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:57,105 INFO L390 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 [2022-07-20 21:32:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:05,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:32:05,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:05,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:32:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:05,548 INFO L356 Elim1Store]: treesize reduction 110, result has 55.8 percent of original size [2022-07-20 21:32:05,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 161 [2022-07-20 21:32:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 5 proven. 396 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:32:06,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:32:23,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633144381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:23,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:23,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 52, 43] total 161 [2022-07-20 21:32:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216270990] [2022-07-20 21:32:23,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:23,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-07-20 21:32:23,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:23,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-07-20 21:32:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=24611, Unknown=0, NotChecked=0, Total=25760 [2022-07-20 21:32:23,495 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 161 states, 161 states have (on average 1.68944099378882) internal successors, (272), 161 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:42,577 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2022-07-20 21:32:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-20 21:32:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.68944099378882) internal successors, (272), 161 states have internal predecessors, (272), 0 states have call successors, (0), 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 105 [2022-07-20 21:32:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:42,579 INFO L225 Difference]: With dead ends: 173 [2022-07-20 21:32:42,579 INFO L226 Difference]: Without dead ends: 169 [2022-07-20 21:32:42,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 115 SyntacticMatches, 29 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18237 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=2936, Invalid=59314, Unknown=0, NotChecked=0, Total=62250 [2022-07-20 21:32:42,582 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 5179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2673 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:42,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 233 Invalid, 5179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2317 Invalid, 0 Unknown, 2673 Unchecked, 1.3s Time] [2022-07-20 21:32:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-20 21:32:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2022-07-20 21:32:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0533333333333332) internal successors, (158), 150 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2022-07-20 21:32:42,615 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 105 [2022-07-20 21:32:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:42,615 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2022-07-20 21:32:42,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.68944099378882) internal successors, (272), 161 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2022-07-20 21:32:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 21:32:42,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:42,616 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:42,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:42,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 21:32:42,823 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash 813324808, now seen corresponding path program 25 times [2022-07-20 21:32:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:42,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7462009] [2022-07-20 21:32:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-20 21:32:43,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:43,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7462009] [2022-07-20 21:32:43,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7462009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543146324] [2022-07-20 21:32:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:32:43,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:43,044 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:32:43,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 21:32:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:32:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-20 21:32:43,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-20 21:32:43,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543146324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:43,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:43,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-20 21:32:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274124105] [2022-07-20 21:32:43,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:32:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:43,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:32:43,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:32:43,492 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:43,941 INFO L93 Difference]: Finished difference Result 300 states and 314 transitions. [2022-07-20 21:32:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:32:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 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 107 [2022-07-20 21:32:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:43,942 INFO L225 Difference]: With dead ends: 300 [2022-07-20 21:32:43,942 INFO L226 Difference]: Without dead ends: 154 [2022-07-20 21:32:43,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 21:32:43,943 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:43,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 57 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:32:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-20 21:32:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-07-20 21:32:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0526315789473684) internal successors, (160), 152 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 160 transitions. [2022-07-20 21:32:43,975 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 160 transitions. Word has length 107 [2022-07-20 21:32:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:43,976 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 160 transitions. [2022-07-20 21:32:43,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 160 transitions. [2022-07-20 21:32:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 21:32:43,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:43,976 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:43,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:44,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 21:32:44,192 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1307992362, now seen corresponding path program 26 times [2022-07-20 21:32:44,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:44,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498284677] [2022-07-20 21:32:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:44,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-07-20 21:32:44,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498284677] [2022-07-20 21:32:44,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498284677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136380600] [2022-07-20 21:32:44,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:32:44,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:44,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:44,392 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:32:44,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 21:32:44,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:32:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:32:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-07-20 21:32:44,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-07-20 21:32:44,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136380600] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:44,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:44,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-20 21:32:44,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559343150] [2022-07-20 21:32:44,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:44,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:32:44,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:44,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:32:44,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:32:44,729 INFO L87 Difference]: Start difference. First operand 153 states and 160 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:44,986 INFO L93 Difference]: Finished difference Result 209 states and 221 transitions. [2022-07-20 21:32:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:32:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 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 109 [2022-07-20 21:32:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:44,989 INFO L225 Difference]: With dead ends: 209 [2022-07-20 21:32:44,989 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 21:32:44,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=623, Invalid=1539, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:32:44,990 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 186 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:44,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 34 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 21:32:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-07-20 21:32:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-07-20 21:32:45,014 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2022-07-20 21:32:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:45,015 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-07-20 21:32:45,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-07-20 21:32:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 21:32:45,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:45,015 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:45,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:45,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 21:32:45,229 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:45,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash 931456272, now seen corresponding path program 27 times [2022-07-20 21:32:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:45,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164656487] [2022-07-20 21:32:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 16 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164656487] [2022-07-20 21:32:53,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164656487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907735860] [2022-07-20 21:32:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:32:53,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:53,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:53,252 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:32:53,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 21:32:53,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 21:32:53,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:53,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 194 conjunts are in the unsatisfiable core [2022-07-20 21:32:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:53,596 INFO L390 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 [2022-07-20 21:33:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:33:09,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:33:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:33:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:10,048 INFO L356 Elim1Store]: treesize reduction 450, result has 56.5 percent of original size [2022-07-20 21:33:10,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 261 treesize of output 624 [2022-07-20 21:33:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 11 proven. 464 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:33:12,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:33:37,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907735860] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:37,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:37,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 54, 47] total 179 [2022-07-20 21:33:37,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747193707] [2022-07-20 21:33:37,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:37,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-07-20 21:33:37,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:37,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-07-20 21:33:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1722, Invalid=30140, Unknown=0, NotChecked=0, Total=31862 [2022-07-20 21:33:37,504 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 179 states, 179 states have (on average 1.6536312849162011) internal successors, (296), 179 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)